Truck driver

Truck driver

Especially for truck drivers. Before you can begin, you will need to obtain а Class A CDL permit from your state of residence.

Questions and answers at examinations:
* General Knowledge.
* Air Brakes.
* Combination Vehicles.
Answer of orange color correct!

General Knowledge

Truck escape ramps:
a. Cannot be used by certain types of heavy vehicles.
b. Are designed to protect vehicles from damage.
c. Should not be used unless you have first tried all other ways to save your vehicle after brake failure.
d. All of the above.

Which of these can cause the vehicle to skid?
a. Not enough weight on the front axle.
b. Over acceleration.
c. Turning too sharply.
d. All of the above.

You are driving a vehicle that could safely be driven at 55 MPH on an open road. But traffic is now heavy, moving at 35 MPH although the speed limit is 55. The safest speed for your vehicle in this situation is most likely:
a. 55 MPH
b. 45 MPH
c. 35 MPH
d. 25 MPH

Every time you park your vehicle and shut the engine off you should:
a. Leave it in gear (if it has a manual transmission).
b. Apply the parking brake.
c. Turn the steering wheel as far to the left as you can.
d. Do all the above.

Which of these describes how you should use the brake pedal on a steep downhill grade?
a. Release the brake when you are 5 MPH below your safe speed, then let your speed come back up to your safe speed and repeat braking again, (bring you speed down 5 MPH below your safe speed.)
b. With stronger pressure as the vehicle goes downhill.
c. Light steady pressure.
d. Light, pumping action.

For an average commercial vehicle, being driven at 55 MPH on dry pavement it will take about ____ to bring the vehicle to a stop.
a. The length of a vehicle.
b. Half the length of a football field.
c. Twice the length of the vehicle.
d. The length of a football field.

Which of these statements about certain types of cargo is true?
a. Oversize loads can be hauled without special permits during times when the roads are not busy.
b. When liquids are hauled, the tank should always be loaded totally full.
c. Unstable loads such as hanging meat or livestock require extra caution on curves.
d. Loads that consist of liquids in bulk do not present vehicle handling problems because they are usually very heavy.

Which of these statements about backing a heavy vehicle is true?
a. Backing is always dangerous.
b. You should back and turn toward the driver’s side whenever possible.
c. You should use a helper and communicate with hand signals.
d. All of the above are true.

When should you wear seat belts?
a. Only in states where it is required by law.
b. Any time you are in a moving vehicle.
c. Only when engaged in interstate commerce.
d. Only when traveling on a highway.

The most common cause of serious vehicle skids is:
a. Driving too fast for road conditions.
b. Poorly designed roads.
c. Poorly adjusted brakes.
d. Poorly adjusted brakes.

If you are being tailgated, you should:
a. Signal the tailgater when it is safe to pass.
b. Speed up.
c. Flash your brake lights.
d. Increase the space in front of you.

The parking brake should be tested while the vehicle is:
a. Moving slowly.
b. Moving at highway speed.
c. Going downhill.
d. Parked

A drivers trip log, if required:
a. May be brought up to date once a week.
b. Is also called a
c. Must be shown immediately when an officer requests it.
d. All of the above.

Should the pre-trip inspection report from the last driver be reviewed during your pre-trip inspection?
a. Yes
b. No

If you are stopped at a roadside rest and found to have a BAC (Blood Alcohol Concentration) of .02 you will:
a. In trouble with the dispatcher
b. Be placed out of service for 24 hours
c. Be placed out of service for 48 hours
d. Be placed out of service for 72 hours

When roads are slippery, you should:
a. Stop and test the traction while going up hills.
b. Drive alongside other drivers.
c. Decreases the distance that you look ahead of your vehicle.
d. Make turns as gently as possible.

While driving, you see a small (1 foot square) cardboard box ahead in your lane. You should:
a. Steer around it when it is safe to do so.
b. Hit it with your vehicle to knock it off the road.
c. Brake hard to avoid hitting it.
d. Stop and direct traffic around it.

Which of these pieces of emergency equipment should be carried at all times in your vehicle?
a. Fire extinguishers.
b. Warning devices for parked vehicles.
c. Spare electrical fuses (if the vehicle uses them).
d. All of the above.

What is counter steering?
a. Using the steering axle brakes to prevent over steering.
b. Steering in the opposite direction from what other drivers expect you to do.
c. Turning the wheel in the opposite direction after steering to avoid a traffic emergency.
d. Turning the steering wheel counter clockwise.

You do not have a hazardous materials endorsement on your commercial drivers license. When can you drive a vehicle hauling hazardous materials?
a. Never.
b. Only when the shipment will not cross state lines.
c. Only when the vehicle does not require placards.
d. Only when a person who has the hazardous materials endorsement rides in the vehicle.

You are driving a new truck with a manual transmission. What gear will you probably have to use to take a long downhill grade?
a. A lower gear that you would use to climb the hill.
b. The same gear you would use to climb the hill.
c. A higher gear that you would use to climb the hill.
d. None: newer trucks can coast down hills.

High beams should be:
a. Dimmed when you are within 100 feet of another vehicle.
b. Used whenever it is safe and legal to do so.
c. Turned on when an oncoming driver does not dim his or her lights.
d. All of the above.

An en-route inspection should include checking:
a. Cargo doors and / or cargo securement.
b. Tire temperature.
c. Brake temperature.
d. All of the above.

Where or when should you test the stopping action of your service brakes?
a. At a special brake testing center only.
b. When the vehicle is traveling downhill without a load.
c. When the vehicle is moving at about 5 MPH.
d. In a parking lot when the vehicle is not moving.

Stab braking:
a. Should never be used.
b. Involves locking the wheels.
c. Involves steady pressure on the brake pedal.
d. Should only be used on slick roads.

Which of these statements about using turn signals is true?
a. When turning, you should signal early.
b. You do not need to use your signal when changing lanes on a four lane highway.
c. You should use your turn signal to mark your vehicle when it is pulled off the side of the road.
d. When turning, you should cancel the signal just before you make the turn.

Retarders:
a. Allow you to disconnect the steering axle brakes.
b. Cannot be used on interstate highways.
c. Work better at very low rpms.
d. Can cause the vehicle to skid when the road is slippery.

Which of these statements about staying alert to drive is true?
a. If you must stop to take a nap, it should be at a truck stop or other public area never on the side of the road.
b. A half-hour break for coffee will do more to keep you alert that a half-hour nap.
c. The only thing that can cure fatigue is sleep.
d. There are drugs that can overcome being tired.

You are driving on a two lane road. An oncoming driver drifts into your lane and is headed straight for you. Which of these is generally the best action?
a. Steer to the right
b. Steer onto the left shoulder
c. Hard braking
d. Steer into the oncoming lane

You should avoid driving through deep puddles or flowing water. But if you must, which of these steps can help keep your brakes working?
a. Applying hard pressure on both the brake pedal and accelerator after coming out of the water.
b. Gently pressing the brake pedal while driving through the water.
c. Turning on your brake heaters.
d. Driving through quickly.

Which of these statements about brakes is true.
a. Brake drums cool very quickly when the vehicle is moving very fast.
b. Brakes have more stopping power when they get very hot.
c. The heavier a vehicle or the faster it is moving, the more heat the brakes have to absorb to stop it.
d. All of the above are true.

What should you do when your vehicle hydroplanes?
a. Release the accelerator.
b. Start stab braking.
c. Counter steer hard.
d. Accelerate slightly.

Which fires can you use water to put out?
a. Gasoline fires.
b. Tire fires.
c. Electrical fires.
d. All of the above.

Your vehicle is in a traffic emergency and may collide with another vehicle if you do not take action. Which of these is a good rule to remember at such a time?
a. Stopping is always the safest action in a traffic emergency.
b. Open the door and jump out if you have time.
c. Heavy vehicles can almost always turn more quickly than they can stop.
d. Leaving the road is always more risky that hitting another vehicle.

Which of these is a sign of tire failure?
a. Steering that feels heavy.
b. Vibration.
c. A loud bang.
d. All of the above.

Which of these statements about drinking alcohol is true?
a. Some people are not affected by drinking.
b. A few beers have the same effect on driving as a few shots of whisky.
c. Coffee and fresh air can sober a person up.
d. All of the above are true.

Which of these can help you stay alert while driving?
a. Taking short breaks before you are drowsy.
b. Keeping the cab warm.
c. Taking a cold pill.
d. Scheduling trips during hours that you are normally asleep.

Which one of these is not part of the check of the engine compartment done for a pre trip inspection?
a. Worn wiring insulation.
b. Engine oil level.
c. Condition of belts and hoses.
d. Valve clearance.

According to the driver’s manual, why should you limit the use of your horn?
a. It wears down the battery.
b. It can startle other drivers.
c. The horn is not a good way to let others know you’re there.
d. You should keep both hands tightly gripping the steering wheel.

You are traveling down a long, steep hill. Your brakes get so hot that they fail. What should you do?
a. Pump the brake pedal.
b. Down shift.
c. Look for an escape ramp or escape route.
d. All of the above.

How far should a driver look ahead of the vehicle while driving?
a. 6-9 seconds
b. 9-12 seconds
c. 12-15 seconds
d. 18-21 seconds

Which of these statements about cargo loading is true?
a. State laws dictate legal weight limits.
b. Slight overloading of a vehicle can make its brakes work better.
c. If the shipper loads cargo, the driver is not responsible for overloading.
d. The legal maximum weight allowed by a state can be considered safe for all driving conditions.

Which of these statements about marking a stopped vehicle is true?
a. The vehicle’s tail lights should be kept on to warn other drivers.
b. If a hill or curve keeps drivers behind you from seeing the vehicle within 500 feet, the rear reflective triangle should be moved back down the road to give adequate warning.
c. You do not need to put out reflective triangles unless the vehicle will be stopped for 30 minutes or more.
d. All of the above are true.

You are driving a 40 foot vehicle at 45 MPH. Driving conditions are ideal (dry pavement, good visibility). What is the least amount of space that you should keep in front of your vehicle to be safe?
a. 2 seconds
b. 3 seconds
c. 4 seconds
d. 5 seconds

The amount of liquid to load into a tank depends on:
a. The weight of the liquid.
b. The legal weight limits.
c. The amount of liquid will expand in transit.
d. All of the above

You are starting your vehicle in motion from a stop. As you apply power to the drive wheels, they start to spin. You should:
a. Take your foot off the accelerator and apply the brakes.
b. Press harder on the accelerator.
c. Take your foot off the accelerator.
d. Try a lower gear.

You should use your mirrors to check:
a. Traffic gaps before you merge.
b. The condition of the tires and cargo.
c. Where the rear of your vehicle is while you make turns.
d. All of the above.

The proper way to hold a steering wheel is at clock positions ____ and ____.
a. 6 and 12
b. 3 and 9
c. 4:30 and 7:30
d. 1:30 and 10:30

Cargo inspections:
a. Should be performed after every break you take while driving.
b. Are only needed if hazardous materials are being hauled
c. Not the responsibility of the driver.
d. Should be performed every 6 hours or 300-miles.

Your brakes can get wet when you drive through a heavy rain. What can this cause when the brakes are applied?
a. Lack of braking power
b. Trailer jackknife
c. Wheel lockup
d. All of the above

How do you test hydraulic brakes for leaks?
a. Measure the free play in the pedal with a ruler.
b. With the vehicle stopped, pump the pedal three times, apply firm pressure for 5 seconds, then hold and see if the pedal moves.
c. Step on the brake pedal and the accelerator at the same time and see if the vehicle moves.
d. Move the vehicle slowly and see if it stops when the brake is applied.

Which of these is a good rule to follow when driving at night.
a. Keep your instrument lights bright.
b. Look directly at oncoming headlights only briefly.
c. Keep your speed slow enough that you can stop within the range of your headlights.
d. Wear sun glasses.

A vehicle is loaded with very little weight on the drive axle. What may result?
a. Damage to drive axle tires.
b. A need to disconnect the steering axle brakes.
c. Better handling.
d. Poor traction.

The key principle in balancing cargo weight is to keep the load:
a. On the side away from most traffic.
b. Balanced in the cargo area
c. To the front
d. To the rear.

Which of these statements about using mirrors is true?
a. There are blind spots that your mirrors cannot show you.
b. You should check your mirrors twice for a lane change.
c. You should look at a mirror for several seconds at a time.
d. Convex mirrors make things look closer than they really are.

Which of these statements about cold weather driving is true?
a. In snow storms, wiper blades should be adjusted so that they do not make direct contact with the windshield.
b. Exhaust system leaks are less dangerous in cold weather.
c. There is no need to worry about engine overheating when the weather is very cold.
d. Windshield washer antifreeze should be added to the washer reservoir.

The most important reason for being alert to hazards is so:
a. You will have time to plan your escape if the hazard becomes an emergency.
b. Accident reports will be accurate.
c. Law enforcement personnel can be called.
d. You can help impaired drivers.

Which of these is a good rule to follow when using a fire extinguisher?
a. Stay downwind of the fire.
b. Keep it as close to the fire as possible.
c. Aim at the base of the fire.
d. All the above.

Is it legal to drive with one fourth of a vehicles leaf springs broken or missing?
a. It doesn’t make any difference as long as you drive slow.
b. Yes
c. No
d. None of the above.

You have left the road in an emergency condition, it is impossible for you to come to a stop prior to returning to the road, which of the following is the best action to take?
a. Stop and turn your vehicle around before entering the road.
b. Make sure the road is clear, and continue to return to the road.
c. Reduce your speed to 20 mph or less before returning to the road.
d. All the above are true.

Which of these statements about down shifting is true?
a. When you down shift for a curve, you should do so before you enter the curve.
b. When double clutching, you should let the RPM’s decrease while the clutch is released and the shift lever is in neutral.
c. When you down shift for a hill, you should do so after you start down the hill.
d. All of the above are true.

Which of these statements about drugs is true?
a. A driver can use any prescription drug while driving
b. Amphetamines (pep pills or bennies) can be used to help the driver stay alert.
c. Use of drugs can lead to accidents and / or arrest.
d. All of the above.

To avoid a crash, you had to drive onto the right shoulder. You are now driving at 40 MPH on the shoulder. How should you move back onto the pavement?
a. Keep moving at the present speed and steer very gently back onto the pavement.
b. Steer sharply onto the pavement and counter steer when both back wheels of your vehicle are on the pavement.
c. Brake hard to slow the vehicle, then steer sharply onto the pavement.
d. Come to a complete stop, if possible, before steering back onto the pavement.

Which of these statements about managing space is true?
a. Smaller vehicles require more space to stop than larger ones.
b. When the road is slippery, you should keep much more space in front of your vehicle.
c. Many accidents are caused by drivers keeping too much space in front of their vehicles.
d. All of the above.

Which of these is the most important things to remember about emergency braking?
a. If the wheels are skidding you cannot control vehicle.
b. Disconnecting steering axle brakes will help keep your vehicle in a straight line during emergency braking.
c. Never do it without down shifting first.
d. It wears brake linings.

To correct a rear wheel (drive wheel) braking skid, you should:
a. Apply more braking pressure to the brake pedal
b. Release brakes and accelerate.
c. Apply more pressure to the brake pedal and steer counter steer.
d. Release the brakes and steer / counter steer.

While driving, ice builds up on your wipers and they no longer clean the windshield. You should:
a. Keep driving, and spray the windshield with washer fluid.
b. Keep driving, and reach out the window and knock the ice off.
c. Pull over in a safe place and remove the ice.
d. Keep driving, and turn your defroster on.

The road you are driving on becomes very slippery due to glare ice., Which of these is a good thing to do in such a situation?
a. Apply the brakes often to keep the linings dry.
b. Down shift to stop.
c. Drive at a varying speed.
d. Stop driving and park where it is safe to do so.

You must park on the side of a level, straight, two lane road. Where should you place the three reflective triangles?
a. One within 10 feet of the rear of the vehicle, one about 100 feet to the rear, and one about 200 feet to the rear.
b. One within 10 feet of the front of the vehicle, one about 200 feet from the front, and one about 100 feet to the rear.
c. One within 10 feet of the rear of the vehicle, one about 100 feet to the rear, and one about 100 feet from the front of the vehicle.
d. One about 50 feet from the rear of the vehicle, one about 100 feet to the rear, and one about 100 feet from the front of the vehicle.

You are driving in the right lane of a four lane, undivided road, you come over a hill and find a car stopped ahead in your lane. You do not have roomed to stop, and the hill blocks your view to the rear. Which of these is most likely the best action to take?
a. Steer to the right.
b. Use hard braking and brace for collision.
c. Steer into the left lane.
d. Steer into the oncoming lanes.

You are checking your tires for a pre trip inspection. Which of these statements is true?
a. Tires of mismatched sizes should not be used on the same vehicle.
b. Radial and bias-ply tires can be used together on the same vehicle.
c. Dual tires should be touching each other.
d. 2/32 inch tread depth is safe for the front tires.

The first step to take if your vehicle catches fire while driving is:
a. Head for the nearest service station.
b. Get the vehicle off the road and stop in an open area.
c. Park in the shade of a building.
d. Immediately open the door and jump out.

Which of these statements about double clutching and shifting is true?
a. If you miss a gear while up-shifting, you must bring the vehicle to a stop.
b. Double clutching should only be used with a heavy load
c. You can use the tachometer to tell you when to shift.
d. Double clutching should not be used when the road is slippery.

The center of gravity of a load:
a. Is only a problem if the vehicle is overloaded.
b. Should be kept as high as possible.
c. Can make a vehicle more likely to tip over on curves.
d. All of the above.

You are testing the stopping action of service brakes on a hydraulic system. Which of these can mean there is a problem?
a. The brake pedal
b. Stopping action is delayed.
c. The vehicle pulls to one side when the brake pedal is pressed.
d. All of the above.

The distance that you should look ahead of your vehicle while driving amounts to about ____ at highway speed.
a. 500 feet
b. 800 feet
c. 1/4 mile
d. One block

Which of these statements about tires and hot weather driving is true?
a. If a tire it is too hot to touch, you should drive on it to cool it off.
b. You should inspect your tires more often because they are more likely to fail.
c. Recapped tires are less likely to fail in hot weather than new tires.
d. All of the above.

You are driving a 40 foot vehicle at 35 mph. Driving conditions are ideal (dry pavement, good visibility). What is the least amount of space that you should keep in front of your vehicle to be safe?
a. 2 seconds
b. 3 seconds
c. 4 seconds
d. 5 seconds

A moving vehicle ahead of you has a red triangle with an orange center on the rear. What does this mean?
a. The vehicle is hauling hazardous materials.
b. A student driver is driving it.
c. It is a law enforcement vehicle.
d. It may be a slow moving vehicle.

Which of these statements about drinking alcohol is true.
a. Alcohol first affects judgement and self-control, which are essential for safe driving.
b. Statistics show that drivers who have been drinking have a much greater chance of being in a crash.
c. A driver can lose his / her license for driving while under the influence of alcohol.
d. All of the above are true.

On which fires can you use the «ABC» fire extinguisher?
a. Electrical fires.
b. Burning fires.
c. Burning cloth.
d. All of the above.

Which of these statements about speed management is true?
a. As the speed of a vehicle doubles, its stopping distance also doubles.
b. You should always brake during curves.
c. You should choose a speed that lets you stop within the distance that you can see ahead.
d. Empty trucks always stop in a shorter distance than fully loaded ones.

Cargo that can shift should have at least ____ tie downs.
a. 1
b. 2
c. 3
d. 4

If a straight vehicle (no trailer or articulation) goes into a front wheel skid it will:
a. Slide sideways and spin out.
b. Go straight ahead even if the steering wheel is turned.
c. Go straight ahead but will turn if you turn the steering wheel.
d. Likely do any of the above.

Which of these is a proper use of vehicle lights and flashers?
a. Flashing your brake lights to warn someone behind you of a hazard that will require slowing down.
b. Turning on your headlights during the day when visibility is reduced due to rain or snow.
c. Flashing your brake lights to warn someone behind you that you’re are going to stop on the road.
d. All of the above.

Which of these statements about crossing or entering traffic with a heavy vehicle is true?
a. Heavy vehicles need larger gaps in traffic than cars.
b. The heavier your load, the smaller the gap needed to cross traffic.
c. The best way to cross traffic is to pull the vehicle partway across the road and block one lane while waiting for the other to clear.
d. Because heavy vehicles are easy to see, you can count on other drivers to move out of your way or slow down for you.

You are checking your wheels and rims for a pre trip inspection. Which of these statements is true?
a. A vehicle can be safely driven with one missing lug nut on a wheel.
b. Mismatched lock rings can be used on the same vehicle.
c. Rust around wheel nuts may mean that they are loose.
d. Cracked wheels or rims can be used if they have been welded.

Controlled braking:
a. Is used to keep a vehicle from skidding.
b. Involves locking the wheels for short periods of time.
c. Can be used while you are turning sharply.
d. All of the above.

Your vehicle has hydraulic brakes. While traveling on a level road, you press the brake pedal and find that it goes to the floor. Which of these statements is true?
a. You should not downshift if you have an automatic transmission.
b. Pumping the brake pedal may bring the pressure up so you can stop the vehicle.
c. The parking brake will not work either because it is part of the same hydraulic system.
d. All of the above are true.

Which of these statements about escape ramps is true?
a. They protect equipment and cargo from severe damage.
b. They are designed to prevent injury to drivers and passengers.
c. They are used to stop vehicles that lose their brakes on downhill grades.
d. All of the above are true.

Which of these tell you that cargo contains hazardous materials?
a. A four inch, diamond shaped hazardous materials label on the container.
b. The name of the hazard class on the shipping paper.
c. A hazardous materials placard on the vehicle.
d. All of the above.

To prevent shifting, there should be at least one tie down for every ____ feet of cargo.
a. 10
b. 15
c. 18
d. 20

Cargo covers:
a. Protect people from spilled cargo.
b. Protect cargo from weather.
c. May be required by law.
d. All of the above.

Which of these statements about accelerating is true?
a. You should feel a «jerking» motion if you are acceleration your vehicle properly.
b. Improper acceleration can cause mechanical damage.
c. When traction is poor, more power should be applied to the accelerator.
d. All the above are true.

You are driving a heavy vehicle with a manual transmission. You have to stop the vehicle on the shoulder while driving on an upgrade. Which of these is a good rule to follow when putting it back in motion?
a. Use the parking brake to hold the vehicle until the clutch engages.
b. Let the vehicle roll backwards a few feet before you engage the clutch.
c. Let the vehicle roll backwards a few feet before you engage the clutch, but turn the wheel so that the back moves away from the roadway.
d. Keep the clutch slipping while slowly accelerating.

Which of these can cause a fire?
a. Loose fuel connections.
b. Under-inflated tires.
c. Electrical short-circuits.
d. All of the above.

You are checking your steering and exhaust systems for a pre-trip inspection. Which of these statements is true?
a. Some leakage of power steering fluid is normal
b. Leaks in the exhaust system are not a problem if they are outside the cab.
c. Steering wheel play of more than 10 degrees (2 inches on a 20-inch steering wheel) can make it hard to steer.
d. All the above are true.

A vehicle is loaded with most of the weight on the steering axle. What may result?
a. A need to disconnect the steering axle brakes.
b. Better handling
c. Too little traction on the steering axle.
d. Hard steering and possible breakdown.

If you are convicted for driving under the influence while driving a commercial vehicle, and this is your first offence, you will most likely get:
a. A fine of $500.00
b. Probation for a period of one year
c. At least a one-year suspension of your CDL
d. A warning

Some liquid tanks are divided into several smaller tanks by:
a. Bore tanks
b. Bulkheads
c. Baffles
d. Containers

Front end header boards:
a. Block the forward movement of your cargo
b. Protect you from your cargo in case of collision
c. Both of the above
d. None of the above

The height of the vehicle center of gravity is very important for safe handling. A high center of gravity means you are more likely to do the following:
a. Increase speed going down hill
b. Increase stopping distance
c. Roll over
d. None of the above

The load means the following?
a. Specified pressure an air tire can carry
b. The maximum safe weight a tire can carry at a specified pressure
c. Both of the above
d. None of the above

Whether or not you load and secure your load yourself, you are responsible for:
a. Knowing your cargo is securely tied down and covered
b. Inspecting your cargo
c. Recognizing overloads and poorly balanced weight
d. All of the above

When approaching a curve you should:
a. Downshift as you come out of the curve
b. Downshift while in the curve
c. Downshift before entering the curve and accelerate slightly as you go through it
d. Downshift at anytime, it doesn’t make a difference

Which of these statements about driving in areas with strong winds is true?
a. Winds are especially a problem when coming out of tunnels.
b. You should drive alongside other vehicles to help break up the wind.
c. You can lessen the effect of the wind by letting some air out of your tires.
d. The lighter your vehicle, the less trouble you will have with the wind.

You are driving a heavy vehicle. You must exit a highway using an off-ramp that curves downhill. You should:
a. Come to a full stop at the top of the ramp.
b. Wait until you are in the curve before downshifting.
c. Slow down to a safe speed before the turn.
d. Slow to the posted speed limit for the off-ramp.

Which of these is a good rule to follow when steering to avoid a crash?
a. Avoid counter steering.
b. Steer with one hand so that you can turn the wheel more quickly.
c. Apply the brakes while turning.
d. Don’t turn any more than is needed to clear what is in your way.

Which of these statements about downshifting for a long downhill grade is true?
a. The proper time to downshift is just after the vehicle starts down the hill.
b. It allows engine compression and friction to help the brakes slow the vehicle.
c. It should not be done with automatic transmissions.
d. It is necessary if the vehicle has retarders.

How do you correct a rear wheel acceleration skid?
a. Apply the brake.
b. Apply more power to the wheels.
c. Stop accelerating.
d. Downshift.

Which of these statements about overhead clearance is true?
a. A vehicles clearance can change with the load carried.
b. You should assume the posted clearance signs are correct.
c. Extra speed will cause air to push your vehicle down for extra clearance.
d. If the road surface causes your vehicle to tilt toward objects at the edge of the road, you should drive close to the shoulder.

Medical certificates must be renewed every:
a. One year
b. Two years
c. Four years
d. None of the above

During a pre-trip inspection you discover an exhaust leak or power steering leak, you should:
a. Report the problem and make arrangements for another bus to use.
b. Go home because shouldn’t drive the vehicle this way.
c. Note the problem and continue your route.
d. None of the above.

During what time in your pre-trip inspection do you check the back emergency door? (to insure it is closed.)
a. During step four (lights first half) the inside walk through.
b. Only during the operation inspection of the pre-trip.
c. Only during the inside walk through.
d. None of the above.

Inspect your cargo after you have driven
a. 25 miles
b. 50 miles
c. 100 miles
d. None of the above

Axle weight means the following?
a. The weight transmitted to the ground by one axle or one set of axles
b. The weight transmitted to the tires from the axle
c. None of the above
d. Both of the above

Blocking your cargo to keep it from sliding must be done:
a. Side of cargo
b. Back of cargo
c. Front of cargo
d. All of the above

The basic two reasons to cover your cargo are 1) to protect the cargo from the weather and 2):
a. Protect people from spilled cargo
b. Protect vehicle following you from spilled cargo
c. Protect the roadway from spilled cargo
d. All of the above

Overlenght, overwidth, and / or overweight loads require:
a. Flashing lights
b. Driving limited to certain times
c. Special transit permits.
d. All of the above

Turn signals should be used:
a. At least 100ft. Before turning or changing lanes
b. At least 200ft. Before turning or changing lanes
c. At least 300ft. Before turning or changing lanes
d. At least 500ft. Before turning or changing lanes

Which of these statements about speed management is true?
a. On a wet road, you should reduce your speed by about 1/3.
b. On packed snow, you should reduce your speed by about 1/2.
c. When the road is slippery, it will take longer to stop and it will be harder to turn without skidding.
d. All of the above.

You are driving on a straight, level highway at 50 mph. There are no vehicles in front of you. Suddenly a tire blows out on your vehicle. What should you do first?
a. Begin light braking.
b. Begin controlled or stab braking.
c. Stay off the brake until the vehicle slows down on its own.
d. Quickly steer onto the shoulder.

As the blood alcohol concentration (BAC) goes up, what happens?
a. The person becomes more dangerous if allowed to drive.
b. The effects of alcohol decreases.
c. The drinker more clearly sees how alcohol is affecting him / her.
d. The drinker can sober up in less time.

Which of these will help keep an engine cool in hot weather?
a. Making sure the engine has the right amount of oil.
b. Properly adjusted v-belts.
c. Avoiding high speed driving.
d. All of the above.

What is hydroplaining?
a. Only occurs when there is a lot of water.
b. Is more likely if tire pressure is low.
c. Cannot occur when driving through a puddle.
d. Only occurs at speeds above 50 mph.

When a vehicle is carrying a load at night, which extends four feet or more beyond the rear of the body, there must be ____ at the extreme end of the load.
a. A red flag.
b. 2 red flags.
c. 1 red light.
d. 2 red lights.

When checking the bus seats, what are you looking for?
a. To insure they are securely fastened to the bus.
b. To see if they have been removed.
c. To insure the seat and back portions are not loose.
d. All the above.

You must inspect your cargo:
a. After every break
b. Every 3 hours or 150 miles
c. Before starting
d. All of the above

Tie downs must be of the proper type and strength. The combined strength of cargo tie downs must be strong enough to lift.
a. One and one half times the weight of the cargo tied down.
b. Three times the weight of the cargo tied down.
c. Twice the weight of the cargo tied down
d. The weight of the cargo tied down

Tank vehicles are used to carry any liquid and are dangerous to drive because:
a. Danger of load surge
b. High center of gravity
c. Both of the above
d. None of the above

Gross Vehicle Weight Rating (GVWR) means the following
a. Maximum gvw specified by manufacture for a single vehicle plus load
b. Maximum gvw specified by the manufacture
c. Maximum gvw specified by manufacture for a single vehicle
d. None of the above

Gross Vehicle Weight (GVW) means the following:
a. Total weight of a single vehicle plus its load
b. Total weight of a single vehicle
c. Both of the above
d. None of the above

Prior to driving, what are some of the items you should check the interior of the bus for?
a. Schoolbooks and students belongings.
b. A student or other passengers
c. Trash and clothing.
d. All the above

How far can the board of education make a student walk to their assigned pick up location?
a. 1 mile
b. 1/2 mile
c. 100 yards
d. 500 yards

There are three types of vehicle inspections, which one is one of them?
a. Post-trip
b. Enroute
c. Pre-trip
d. All the above

You are checking your brakes and suspension system for a pre trip inspection. Which of these statements is true?
a. Brake pads should not have brake fluid on them.
b. One missing leaf in a leaf spring can be dangerous.
c. Brake shoes should be at least 1/32 inch thick.
d. All of the above are true.

You must park on the side of a level, straight, four lane, divided highway. Where should you place the three reflective triangles?
a. One about 50 feet from the rear of the vehicle, one about 100 feet to the rear, and one about 100 feet from the front of the vehicle.
b. One within 10 feet of the front of the vehicle, one about 200 feet from the front, and one about 100 feet to the rear.
c. One within 10 feet of the rear of the vehicle, one about 100 feet to the rear, and one about 100 feet from the front of the vehicle.
d. One within 10 feet of the rear of the vehicle, one about 100 feet to the rear, and one about 200 feet to the rear.

Which of these statements about engine overheating is true?
a. You should never remove the radiator cap on a pressurized system.
b. If your engine overheats within 20 miles of the end of your trip, you should complete the trip and then check the problem.
c. Antifreeze is not needed when the weather is warm.
d. You should never shut off an overheated engine until it cools.

Some traffic emergencies may require you to leave the road. Which of these is a good thing to remember?
a. Brake gently to avoid skidding.
b. Use hard braking if you are moving at a speed greater that 20-mph.
c. If you must leave the road, try to get all wheels off the pavement, or at least one side of vehicles tires off the road.
d. Most shoulders will not support a large vehicle.

When looking ahead of your vehicle while driving you should look:
a. To the left side of the road.
b. To the right side of the road.
c. Back and forth, near and far.
d. Straight ahead.

Which of these items is checked in a pre trip inspection?
a. Whether all vehicle lights are working and are clean.
b. Cargo securement.
c. Wiper blades.
d. All of the above.

The «reaction distance» is the distance traveled from the time:
a. The brain tells the foot to push the brake pedal to the time the foot actually pushes the pedal.
b. The eyes see a hazard to the time the brain knows that it is a hazard.
c. The eyes see a hazard to the time the foot pushes the brake pedal.
d. The brake pedal is pressed to the time the brakes begin to slow the vehicle.

Which of these statements about vehicle fires is true?
a. If a trailer is on fire, you should drive fast to put out the flames.
b. A burning tire must be cooled.
c. If cargo in a van or a box trailer catches on fire, you should open the cargo doors as soon as you can.
d. If your engine is on fire, you should open the hood as soon as you can.

Which of these is the most important thing to remember about emergency braking?
a. Never do it without downshifting first.
b. Disconnecting the steering axle brakes will keep the vehicle in a straight line.
c. If the wheels are skidding, you cannot control the vehicle.
d. Will always work and allow you to avoid an emergency.

When driving a commercial vehicle with a height over 13 feet, you should:
a. If you aren’t sure a clearance is high enough, stop and make sure
b. Not worry about the height clearance as long as you stay on the state or federal highways
c. Assume all clearances are high enough
d. All of the above

The Gross Combination Weight (GCW) means the following?
a. The total weight of a powered unit plus trailer(s)
b. The total weight of single plus load
c. The total weight of a powered unit plus trailer(s) plus the cargo.
d. The total weight of single vehicle

Too much weight on the steering axle can cause the following:
a. Hard steering
b. Damage to the tires
c. Damage to the steering axle
d. All the above

Cargo should have at least one tie down for each:
a. 10 feet of cargo
b. 5 feet of cargo
c. 12 feet of cargo
d. 20 feet of cargo

The purpose of a baffle is to:
a. Control the load surge
b. Separate the load
c. To keep expansion of load down
d. None of the above.

The new BAC (Blood Alcohol Concentration) for commercial drivers to be Considered intoxicated when driving a commercial vehicle is:
a. .01
b. .04
c. .05
d. .10

Which of these is a good driving rule for work zones?
a. Turn on you flashers / hazard lights
b. Use your brake lights to warn drivers behind you.
c. Drive slowly
d. All of the above

Brake «fade»:
a. Can be corrected by letting up on the brakes for 1-2 seconds and then re-apply them.
b. Only occurs with drum brakes.
c. Can be caused by the brakes becoming too hot.
d. All of the above.

You do not have a hazardous materials endorsement on your commercial driver’s license. You are asked to haul hazardous materials in a placarded vehicle. You should:
a. Refuse to haul the load.
b. Take the placards off the vehicle.
c. Haul the load, but file a report with the department of transportation after the trip.
d. Haul the load, but only to the nearest place where a driver with a hazardous materials endorsement can take over.

You should stop driving:
a. After 5 hours.
b. After 7 hours.
c. After 9 hours.
d. When you become sleepy.

Which of these statements about downshifting is true?
a. When you downshift for a hill, you should do so after you start down the hill.
b. When double clutching, you should let the rpm’s decrease while the clutch is released and the shift lever is in neutral.
c. When you downshift for a curve, you should do so before you enter the curve.
d. All of the above.

For your safety, when setting out reflective triangles you should:
a. Keep them out of sight while you walk to the spot where you set them out.
b. Carry the triangles at your side.
c. Turn off your flashers.
d. Hold the triangles between your body and oncoming traffic.

You must drive on a slippery road. Which of these is a good thing to do in such a situation
a. Apply the brakes during turns.
b. Slow down gradually.
c. Use a smaller following distance.
d. All the above.

Cargo that is not loaded or secured properly can cause many problems. Which of these statements is true?
a. Other highway users can hit or be hit by loose cargo.
b. Loose cargo can cause injury to the driver or passengers during a quick stop or crash.
c. Overloading can damage vehicle.
d. All of the above are true.

Which item below lists almost all or all the emergency equipment that is required on a school bus?
a. A fire extinguisher, flashlight, fusees, electrical fuses (if your vehicle uses them), a crow bar, emergency triangles, and a first aid kit (with an emergency medical card for each student inside the first aid kit).
b. A crow bar and fire extinguisher only.
c. A can of brake fluid, flashlight, and a new bottle of window washer fluid.
d. A hammer, nails, screwdriver, pliers, and screws.

As part of your pre trip inspection you must:
a. Check for poorly balanced weight
b. Check if cargo is secured
c. Check for overloads
d. All of the above

No matter how small the cargo is, it should have at least:
a. Small loads do not have to have tie downs
b. One tie downs
c. Two tie downs
d. None of the above

Overloading can have a bad effect on?
a. Speed control
b. Steering
c. Braking
d. All of the above

Where should you ignition key be during your pre-trip inspection?
a. In the ignition
b. On the dashboard
c. In your pocket
d. Pocket on the door

Dry bulk tanks require special care because:
a. The load can shift
b. They have a high center of gravity
c. Both of the above
d. None of the above

Under loaded front axles can cause the following:
a. Too much play in the steering wheel
b. Poor traction
c. Damage to the tires.
d. All of the above

Air Brakes

Why must air tanks be drained?
a) Your transmission fluid may drain out
b) Your brakes may fail because of water freezing
c) You will drive too quickly if they are not
d) Your left-side brake will cease to operate

What is the best way to test your vehicle’s low air pressure warning signal?
a) Pump the brakes while your vehicle is fully on
b) With the engine off, step on and off the brake pedal to lower the air pressure below 60 psi
c) Manually let the air out of your brakes and see if the signal comes on
d) Pump the brakes until the air pressure drops below 30 psi

The tractor protection valve
a) Closes if you apply the parking brakes
b) Provides the air supply for the brake system
c) Will close itself automatically if the air supply drops to a certain level
d) Does all of the above

You should know that your brakes are fading when:
a) You have to push harder on the brake pedal to control your speed on a downgrade
b) The brake pedal feels spongy when you apply pressure
c) Pressure on the brake pedal is released and speed increase

If the spring brakes are on, when should you push the brake pedal?
a) Only when driving down a hill
b) Only on slippery roads
c) Never

The driver must be able to see a low air pressure warning which comes on before pressure in the service air tanks falls below ___ psi.
a) 40
b) 60
c) 80

If your truck or bus has a dual parking control valves, you can use pressure from a separate tank to:
a) Balance the service brake system when you are parked
b) Stay parked twice as long without using up service air pressure
c) Release the spring emergency/parking brakes to move a short distance

The brake pedal in an air brake system:
a) Controls the speed of the air compressor
b) Controls the air pressure applied to put on the brakes
c) Is connected to slack adjusters by a series of rods and linkages

Parking or emergency brakes of trucks and buses can be legally help on by ___ pressure.
a) Spring
b) Fluid
c) Air

The most common type of foundation brake found on heavy vehicles is the:
a) Wedge drum
b) S-cam drum
c) Disc brake

If your truck has a dual air system and one of the systems is low on pressure:
a) The brake drums will not be fully pressurized
b) Either the front or rear brakes will not be fully operational
c) The manual slack adjusters on the S-cam brakes are not set properly

In air brake vehicles, the parking brakes should be used:
a) As little as possible
b) To hole your speed when going downhill
c) Any time the vehicle is parked

The air compressor governor controls:
a) When air is pumped into the air tanks
b) The speed of the air compressor
c) Air pressure applied to the brakes

The stop light switch:
a) Turns on the brake lights to warn drivers behind you
b) Tells you when you need to use your emergency brakes
c) Tells you when the air brake system is low on air pressure

For air brake systems in good condition, the air compressor should start pumping at about ____ psi.
a) 100
b) 125
c) 150

The air loss rate for a straight truck or bus with the engine off and the brakes on should not be more than:
a) 1 psi in one minute
b) 2 psi in 45 seconds
c) 3 psi in one minute

The braking power of the spring brakes:
a) Depends on the service brakes being in adjustment
b) Is not affected by the condition of the service brakes
c) Can only be tested by highly-trained brake service people

How should you check that the spring brakes come on when air pressure in the system drops below a certain level?
a) Park on a slight incline, drain off air pressure, set parking brakes, and check for movement
b) Chock the wheels, apply the parking brake, shut the engine off, and pump the brake pedal to reduce air tank pressure
c) Wait for normal air pressure, release the parking brake, move the struck forward slowly, and apply the brakes firmly using the brake pedal

If you are driving down a steep downgrade and you have reaches your «safe» speed of 40 mph, you would apply the service brakes until your speed drops to ___ mph.
a) 25
b) 30
c) 35

The air brake lag distance at 55 mph on dry pavement adds about ___ feet to your stopping distance.
a) 12
b) 32
c) 52

Repeatedly pressing and releasing (fanning) the brake pedal may result in:
a) The loss of brake air pressure
b) A build up of brake air pressure
c) No change in brake air pressure

Emergency controlled braking is when you:
a) Apply the brakes as hard as you can without locking the wheels
b) Brake as hard as you can, release the brakes when the wheels lock, and put the brakes back on again when the wheels starting rolling
c) Apply the hand valve for one second, then push hard on the brake pedal

If your truck’s air compressor has its own oil supply, when should you first check the oil level?
a) During your first en route inspection
b) Immediately after stopping
c) Before driving

Which of the following is NOT part of the air brake system?
a) Parking brake system
b) Service brake system
c) Radio signal system
d) Emergency brake system

Which of the following is NOT part of the braking process when driving a tractor-trailer combination vehicle with an anti-lock braking system (ABS)?
a) You should drive more quickly so that you will be able to keep the trailer and tractor straight.
b) You should use only the braking necessary to stay safely in control
c) Brake the same way no matter what you’re driving: a vehicle with ABS, a vehicle with a trailer, or something else
d) When you slow down, you should monitor your tractor and trailer and ease off the brakes to keep control

How would you check your truck’s slack adjusters?
a) Use gloves and pull hard on each slack adjuster you can reach
b) Accelerate and then brake hard
c) Press the brake pedal while listening for any strange noises
d) All of the above are correct

Which of the following is NOT part of the drum brake?
a) Brake drum
b) Safety valve
c) Axle
d) Slack adjuster

Slack adjusters are
a) Part of your air brake system used to adjust the brakes
b) Between the push rod and S-cam on drum brakes
c) Between the power screw and push rod on disc brakes
d) All of the above

When should you drain your air tanks?
a) At the end of a trip
b) At the end of each working day
c) At the end of the fiscal quarter
d) At the end of the month

How can you tell if your vehicle is equipped with an anti-lock braking system (ABS)?
a) The vehicle was manufactured after 2000
b) ABS is still optional
c) The vehicle was manufactured after 1998
d) The vehicle was manufactured after 2010

Which of the following is true about a dual air brake system?
a) One system is called the «primary» system and the other one is called the «secondary» system
b) Usually, one system operates the front axle and the other system operates the rear axle
c) It uses a single set of brake controls
d) All of the above are true

An anti-lock braking system (ABS)
a) Increases your normal braking capability
b) Decreases your normal braking capability
c) Shortens your stopping distance
d) Activates when the wheels are about to lock up

Which of the following should you do before leaving your vehicle unattended?
a) Put on the parking brakes
b) Chock the wheels
c) Remove the keys
d) Do all of the above

When should you use the parking brake?
a) Every time you leave your vehicle, with rare exceptions
b) Every time you leave your vehicle for any period of time
c) Only if you are away from your vehicle for an extended period of time
d) Only in urban areas where there are many other vehicles

Why must you study air brakes in the state of California?
a) Otherwise, you will have to get a CDL with restrictions
b) Otherwise, you cannot get a CDL at all
c) All trucks have air brakes in California
d) Otherwise, you can only get a CDL permit

Which vehicles must have low air pressure warning signals?
a) Only those built after 2005
b) Only those built after 2010
c) None
d) All vehicles with air brakes currently in operation

What is the best way to test if your vehicle’s spring brakes come on automatically?
a) On single vehicles, continue to step on and off the brake pedal until the parking brake valve pops out
b) On tractor trailers, continue to step on and off the brake pedal until the parking brake valve has popped out
c) Continue to step on and off the brake pedal until the manufacturer’s low psi specification has been met for spring brakes to deploy
d) All of the above are correct

Spring brakes are
a) Brakes that come on automatically on a truck on tractor when the psi drops too low
b) Make up of powerful springs that are help back by air pressure while your are driving
c) Not going to take full effect until your psi drops to a certain range, often 20 to 30 psi
d) All of the above

Which of the following will be true about your brake function if your ABS fails?
a) You will have to brake function, and the truck will be out of control
b) You will still have normal brake function and will just need to get the ABS repaired soon
c) It may cause problems with other mechanical systems and possibly pose a huge fire risk
d) It will slow your truck to a halt and force you to pull over

Which of the following can cause brakes to fail or fade?
a) Brakes being out of adjustment
b) Not relying on engine braking enough
c) Excessive use of the service brakes
d) All of the above

The purpose of a supply pressure gauge is
a) To tell you how hot the air in the tank is
b) To tell you how much air is in the tank
c) To warn you if there is too little air in the tank
d) To do all of the above

The maximum leakage rates per minute after the initial pressure drop are
a) 5 psi for single vehicles and 10 psi for combination vehicles
b) 3 psi for single vehicles and 4 psi for combination vehicles
c) 1 psi for singe vehicles and 3 psi for combination vehicles
d) 5 psi for single vehicles and 6 psi for combination vehicles

How do brakes work on a long, steep downgrade?
a) They work as the main braking mechanism
b) They work as the main braking mechanism, with the engine braking effect as an emergency backup
c) Not applicable; no braking effect is involved in a downgrade
d) They work as a supplement to the braking effect of your engine

At what measurement is the safety valve USUALLY set to open?
a) 250 psi
b) 150 psi
c) 200 psi
d) 100 psi

Which conditions are ideal for front wheel brakes?
a) None
b) All weather conditions
c) Only wet or icy conditions
d) Only good weather

Controlled braking
a) Is used to keep a vehicle in a straight line when braking
b) Involves locking the wheels for short periods of time
c) Can be used while you are turning sharply

Your bus or truck has a dual air brake system. If a low air pressure warning comes on for only one system, what should you do?
a) Reduce your speed and drive to the nearest garage for repairs
b) Stop and park safely. Continue only after the system has been fixed
c) Reduce your speed and test the remaining system while driving

The safety valve is set to automatically reduce pressure at __ psi.
a) 150
b) 50
c) 100

Oil and water usually collect in compressed air tanks. If you do not have an automatic tank drain, when should you drain the air tanks?
a) After every four hours of service
b) Once a week
c) After every working day

To make an emergency stop with air brakes, using the stab braking method, you should
a) Brake hard until the wheels lock and then get off the brakes for as long as the wheels were locked
b) Press on the brake pedal as hard as you can, release the brakes when the wheels lock, and apply the brakes again when the wheels start to roll
c) Pump the brake pedal

When you apply the brakes by pushing down on the brake pedal,
a) Air pressure is reduced to the brake pads
b) Compressed air is let out of the system
c) Air pressure is applied to the brake pads

Repeatedly pressing and releasing (fanning) the brake pedal may result in
a) A buildup of brake air pressure
b) A loss of brake air pressure
c) No change in brake air pressure

When you pull hard on a slack adjuster, if its free play is more than ___, the slack adjuster will need to be adjusted.
a) ½ inch
b) ¼ inch
c) 1 inch

What is the danger of non-functioning low pressure warning signal?
a) You could lose air pressure, but you would know about it anyway
b) This could cause sudden emergency braking in a single-circuit air system
c) Neither of the above

With air brake-equipped vehicles, the parking brakes should be used
a) As little as possible
b) Whenever you leave the vehicle unattended
c) Only during pre-trip and post-trip inspections

What is a slack adjuster?
a) It is the space between the rear wheels
b) It is an adjusting nut on the backside of the brake drum, used for adjusting the brakes
c) It is an adjusting nut under the cab to adjust the springs

Air brake-equipped vehicles have
a) An air use gauge
b) A backup hydraulic system
c) An air supply pressure gauge

An air brake system is fully charged at ___ psi.
a) 150
b) 125
c) 75

To test the air service brakes,
a) Stop the vehicle, put it low gear, depress the service brake, and then gently pull against the brakes
b) Brake firmly while slowly moving backward
c) Brake firmly while slowly moving forward

In ideal conditions, a truck or bus equipped with a n air brake and traveling at 55 mph would require what stopping distance?
a) From 100 to 250 feet
b) More than 450 feet
c) Less than 100 feet

The air brake lag distance at 55 mph on dry pavement adds about ___ feet.
a) 45
b) 32
c) 65

To check the slack adjusters on S-cam brakes, you should
a) Park on level ground, chock the wheels, and release the parking brakes
b) Stop on level ground and apply the parking brakes
c) Park on level ground and drain off air pressure before adjusting

Before you drive a truck or bus with a dual air brake system, the pressure in each air brake system should be at least ___ psi.
a) 120
b) 100
c) 80

The service brake applies and releases
a) In the event of an emergency
b) The brake when use the brake pedal during normal driving
c) The parking brake when you use the parking brake control

If air pressure is not built up fast enough,
a) You should be ready to use your parking brakes to stop
b) The air pressure may drop too low during driving
c) The alcohol container may be low

Which of these is NOT a proper time to apply the parking brakes?
a) When you park less than one hour
b) When your brakes are very hot
c) When you are testing whether they will hold the vehicle

It is not safe to drive a vehicle that has brake drums (or disc) with cracks or that are thinner than the manufacturer’s specifications. Typically, this will be
a) ¼ inch
b) 1/3 inch
c) ½ inch

How do you test the hydraulic brakes for leaks?
a) Drive slowly and pump the brake pedal. Make sure it doesn’t hit the floor
b) Drive 20 mph and slam on the brakes
c) Pump the brake pedal three times; then apply firm pressure to the pedal and hold for five seconds. The pedal should not move

You know that your brakes are fading when
a) You have to press the brake pedal harder to control speed on a downgrade
b) Pressure on the brake pedal is released and speed increases
c) The brake feels spongy when pressure is applied

If your truck has a properly functioning dual air brake system and minimum-size air tanks, the air pressure should build from 85 to 100 psi within ___ seconds.
a) 60
b) 20
c) 45

The brake chamber fills with air, pushing the rod out, which moves the ___, which twists the ___.
a) Slack adjuster; brake camshaft
b) Brake camshaft; tie rod
c) Slack adjuster; tie rod

Modern air brake systems are three different systems combined; the service brakes, parking brakes, and ___ brakes.
a) Emergency
b) Foot
c) S-cam

The emergency brake system
a) Uses the service brake to stop the vehicle in the event of a brake system failure
b) Uses parts of the service brake and parking brake systems to stop the vehicle in the event of a brake system failure
c) Uses the parking brake to stop the vehicle in the event of a brake system failure

The parking or emergency brakes of trucks or buses can legally be help on by ___ pressure.
a) Spring
b) Air
c) Fluid

You are on a steep downgrade and have reached your safe speed of 40 mph. You would apply the service brakes until your speed drops to ___ mph.
a) 35
b) 25
c) 30

To test the air leakage rate, you should
a) Charge the air system and leave the engine running
b) Turn off the engine and release the parking brake
c) Leave the engine running and release the parking brake

What is a dual air brake system?
a) A two-brake system: One brake for daytime driving and one for nighttime driving
b) A two-brake system: One brake operates the front brakes, and one operates the back brakes
c) A two-brake system, one brake for each side of the vehicle

It is accepted that too much heat caused by using your brakes too often can also cause
a) The brake linings to split
b) The modulated control valve to wear out
c) Brake fade or failure

Air braking takes more time than hydraulic braking because air
a) Takes more time to flow through the lines than hydraulic fluid
b) Brakes require heavier return springs
c) Brakes use different brake drums

If your vehicle has an alcohol evaporator, every day during cold weather, you should
a) Change the alcohol from a new bottle
b) Check the oil for alcohol content
c) Check and fill the alcohol level

How can you check the slack adjusters?
a) Park on an incline and see if the vehicle rolls
b) Park on level ground, turn off the parking brakes, and press the brake pedal
c) Park on level ground, turn off the parking brakes, and pull hard on each slack adjuster. It shouldn’t move more than one inch

The air compressor stops pumping air at ___ psi.
a) 100
b) 150
c) 125

The air supply pressure gauge shows how much pressure
a) Is in the air tanks
b) You have used in this trip
c) Is going to the brake chambers

What factors can cause brakes to fade or fail?
a) Overheating, low air pressure, and not relying on the engine braking effect
b) Not taking your foot off the accelerator
c) Not pressing the brake pedal hard enough

Air tanks must be drained
a) To drain moisture and oil out of the tanks
b) To tell you how much air is in the tanks
c) To drain all the air out of the tanks

Excessive use of the service brakes results in overheating, which can lead to
a) Expansion of the brake drums
b) Increased contact between the brake drums and the brake linings
c) Improper adjustment of S-cam

What is the first thing you should do when a low air pressure warning comes on?
a) Stop and safely park as soon as possible
b) Downshift
c) Upshift

The parking brake applies and releases
a) In the event of an emergency
b) The parking brakes when you use the parking brake control
c) The brake pedal during normal driving

Before starting down a hill, you should be in the
a) So you only have to apply the brake just hard enough to feel a definite slowdown
b) So you can coast downhill
c) So you can go through the gears on the way down

The S-cam forces the brake shoes away from one another and presses them against the inside of the brake drum. It is called the S-cam because
a) It is shaped like the letter «S.»
b) It is shaped like the letter «N.»
c) It is shaped like the letter «Z.»

When you are going down a long or steep grade after selecting the proper gear, the proper method of braking is to brake until your speed is about ___ miles per hour below your «safe» speed and then release your brakes.
a) 10
b) 15
c) 5

If the air compressor should develop a leak, what keeps the air in the tanks?
a) The emergency relay valve
b) The tractor protection valve
c) The one-way check valve

If your bus or truck has dual parking control valves, you can use pressure from a separate tank to
a) Stay parked twice as long without using up service air pressure
b) Release the spring emergency/parking brakes to move a short distance
c) Balance the service brake system when you are parked

What are spring brakes?
a) If the air brakes leak down, springs apply the brakes to stop the vehicle
b) They are the springs on the brake pedal
c) They are the brakes used for parking

When you apply the brakes, the brake shoes/linings are pressed against the
a) Brake drum
b) S-cam
c) Slack adjuster

How should you check that the spring brakes come on when the air pressure in the system drops below a certain level?
a) Park on level ground, chock the wheels, release the parking brake when you have enough air pressure, shut the engine off and repeatedly press and release the brake pedal
b) Park on a slight incline, drain off air pressure, set the parking brakes, and check for movement
c) Park on level ground, wait for normal air pressure, release the parking brake, move the truck forward slowly, and apply the brakes firmly using the brake pedal

During normal driving, spring brakes are usually held back by
a) Springs
b) Bolts and braces
c) Air pressure

If you must make an emergency stop, brake so that
a) Use the full power of the brakes to lock them
b) Can steer and you vehicle will stay in a straight line
c) Use the hand brake before the brake pedal

The brake system that applies and releases the brakes when the driver presses the brake pedal is the ___ brake system
a) Service
b) Emergency
c) Parking

The brake pedal in an air brake system
a) Controls the air pressure applied to the brakes
b) Controls the speed of the air compressor
c) Is connected to slack adjusters by a series of rods and linkages

Your truck has a dual air system, and one of the systems loses its pressure. What will happen?
a) The manual slack adjusters of the S-cam brakes will not be set properly
b) The brake drums will not be fully pressurized
c) Either the front or rear brake will not be fully operational

When is it OK to leave your truck unattended without applying parking brakes or chocking the wheels?
a) If you are conducting your pre-trip inspection
b) If you will only be away from the truck for a few minutes
c) Never

Which of these is the most important thing to remember about emergency braking?
a) If the wheels are skidding, you cannot control the vehicle
b) Never do it without downshifting first
c) Disconnecting the steering axle brakes will help keep your vehicle in a straight line during emergency braking

The application pressure gauge shows how much pressure you have
a) In the tanks
b) In a modulating control valve
c) When you are applying the brakes

To correct a drive-wheel braking skid, you should
a) Stop braking, turn quickly, and countersteer
b) Increase braking
c) Increase braking, turn quickly, and countersteer

To engage the parking brakes under normal conditions, the driver must first
a) Let the air out of the spring brakes
b) Turn off the engine
c) Be sure the air brake system is fully pressurized

If oil and water collects in the air tanks, what could happened to the brakes?
a) The brakes could heat up
b) The brakes could fail
c) The brakes could lock up

What is the purpose of an alcohol evaporator?
a) To have a drink available if you get thirsty
b) To reduce the risk of ice in the brake valves and other parts in cold weather
c) To keep you from needing to drain the air tanks as often

The modulating control valve allows you to control the
a) Spring brakes
b) Front brakes
c) Amount of pressure in the brake system

The parking or emergency brake on a heavy vehicle can only be held in position by something that cannot leak away, like
a) Spring pressure
b) Hydraulic pressure
c) Air pressure

The S-cam
a) Pulls the brake shoes away from the drum and allows the wheels to roll freely
b) Controls the flow of air to each of the brake chambers
c) Forces the brake shoes against the inside of the brake drum

The use of air brakes on a downgrade is only a supplement to the
a) Use of the spring brakes
b) Braking effect of the engine
c) Use of the front brake limiting valve

Water should be drained from the compressed air tanks
a) Because water can freeze in cold weather and cause brake failure
b) To keep from fouling the air compressor oil
c) Because the low boiling point of water reduces braking power

The total stopping distance for air brakes is longer than that for hydraulic brakes because of
a) Brake lag
b) Effective braking
c) Reaction distance

How can you test the low pressure warning signal?
a) Shut off the engine and see if the air pressure leaks down
b) While the engine is running, step on and off the brake pedal
c) Shut off the engine with enough air pressure, turn on the electrical power, and step on and off the brake pedal until the low air pressure warning signal comes on

What do air brakes use to make the brakes work?
a) Compressed gas
b) Compressed air
c) Compressed oil

You should brake in a way that will keep your vehicle in a straight line and allow you to turn if it becomes necessary. You can use the
a) «Stab braking» method
b) «Controlled braking» method
c) Either of the above methods

Tractor and straight truck spring brakes will come fully on when the air pressure drops to a range of ___ psi.
a) 10 to 15
b) 20 to 45
c) 60 to 80

The application pressure gauge shows how much pressure you have
a) In the tanks
b) When you are applying the brakes
c) In a modulating control valve

When a low air pressure warning comes on, the most important thing to do is
a) Stop and safely park as soon as possible
b) Upshift
c) downshift

Converter dollies built on or after March 1, 1998 are required to have anti-lock brakes. These dollies will have
a) A yellow malfunction lamp on the left side of the dolly
b) A yellow malfunction lamp in the center of the dolly
c) A yellow malfunction lamp on the right side of the dolly

It is not safe to drive a vehicle that has brake drums with cracks that are longer than ____ of the width of the friction area.
a) ¼
b) ½
c) 5/16

The driver must be able to see a warning before the pressure in the service air tanks falls below__ psi.
a) 50
b) 60
c) 80

Some air brake systems have an alcohol evaporator. What may happen if you don’t keep the unit filled with alcohol?
a) Ice may form on the brake pads and warp them
b) The S-cam may not rotate back when you release the brake pedal
c) Ice may form in the air storage tanks and cause the brakes to fail

The spring brakes used on the chambers in a straight truck will bring you to a stop when air pressure drops below ___ psi.
a) 20
b) 60
c) 80

Your truck or bus has a dual air brake system. If a low air pressure warning comes on for only one system. What should you do?
a) Bring your vehicle to a complete stop right away and safely park. Continue only after the system is fixed
b) Reduce your speed, and test the remaining system while under way
c) Reduce your speed and drive to the nearest garage for repairs

Why drain water from compressed air tanks?
a) Water low boiling point reduces braking power
b) Water can freeze in cold weather and cause brake failure
c) Water cools the compressor too much

The safely valve is set automatically when pressure is:
a) 50
b) 100
c) 150

How should you check that your service brakes are working properly?
a) Park on slight grade, drain off air pressure, set parking brake and check to the movement
b) Park on a level ground, chock the wheels, engage the parking brakes when you have the correct amount of air pressure to do so and shit the engine off
c) Park on level ground, wait until normal air pressure is reached, release the parking brake and move forward slowly at about 5 mph. Then apply the brakes firmly using the brake pedal

A straight truck or bus air brake system should not leak at the rate of more than ___ psi per minute with the engine off and the brakes released.
a) 1
b) 2
c) 3

Which of these is NOT a proper time to apply the parking brakes?
a) To brake vehicle very hard, in other word when coming down the steep grade
b) To use parking brakes if you park for less than 1 hour
c) If you are going to use the parking brakes you need to make sure that they will hold the vehicle

The proper use of the brakes when going down a long steep grade after selecting a proper gear is to brake until your speed is about ___ mph below the posted speed for your safety and release your brake.
a) 5 mph
b) 15 mph
c) 10 mph

Combination Vehicles

TRUE OR FALSE:
More than half of truck driver deaths in crashes are the result of truck rollovers.
True

Fully loaded rigs are ___ times more likely to roll over in a crash than empty rigs.
10

What can you do to prevent rollovers?
keep the cargo close to the ground drive slowly around turns

TRUE OR FALSE:
Keeping cargo low is even more important in combination vehicles than in straight trucks.
True

Rollovers happen when you turn too___
Fast

Trucks with trailers have a dangerous…
crack the whip effect

TRUE OR FALSE:
When pulling trailers, a sudden movement with your steering wheel may cause your tralier to tip over.
True

Large combination vehicles take longer to stop when they are…
Empty

How much follwoing distance should you have?
At leats 1 second for every 10 feet of vehicle length under 40 mph.

How much following distance should you have driving 50 mph?
At least 1 second for every 10 feet of your vehicle plus an additional second.

When lightly loaded, the very stiff suspension springs and strong brakes give poor traction.
True

TRUE OR FALSE:
Tests have shown that bobtails are easy to stop.
False

In any combination rig, allow lots of ___ distance and look far ahead.
Following

What is the best way to recognize that the trailer has started to skid?
Seeing it in your mirriors.

TRUE OR FALSE:
When braking hard you should check your mirriors to make sure that your trailer is staying where it should?
True

Why should you not use the trailer hand brake to straighten out a jackknifing trailer.
This is the wrong thing to do since the brakes on the trailer wheels caused the skid in the first place.
Once the trailer wheels grip the road again, the trailer will start to follow the tractor and starighten out.

What is off tracking?
When a vehicle goes around a corner, the rear wheels of the trailer will track further to the inside of the turn than the wheels of the tractor.
Longer vehicles will off track more.

TRUE OR FALSE:
If you must back on a curved path, back to the drivers side so you can see.
True

What type of trailers can get stuck on rail-road highway crossing?
Lowboy
Car Carrier

Why should you not use the trailer hand valve while driving?
The trailer hand valve should only be used to test the brakes.
Do not use it in driving because of the danger of making the trailer skid.

Describe what trailer air supply control does.
You push in Red valve to supply the trailer with air, and pull it out to shut the air off and put on the trailer emergency brakes.
The valve will pop out ( closing the tractor protection valve ) when the air pressure drops into the range of 20-45 psi.

Describe what the service line is for.
The service line ( called the control line ) carries air, which is controlled by the foot brake or the trailer hand brake.
Depending on how hard you press the foot brake or hand valve, the pressure in the service line will similarily change.

What does the emergency air line do?
It supplies air to the trailer air tanks
Loss of air pressure in the emergency line causes the trailer emergency brakes to come on.

TRUE OR FALSE:
Blue is used for the service line and red for the emergency.
True

Why should you use chocks when parking a trailer without spring brakes.
Eventually, the air will leak away and there will be no brakes.

Where are shut-off valves?
In the back of the trailer.

TRUE OR FALSE:
You may not notice a major leak in the service line until you try and put on the brakes.
True

TRUE OR FALSE:
All new trailers and converter dollies are requirered to have anti-lock brakes.
True

TRUE OR FALSE:
ABS will increase your stopping distance.
False

TRUE OR FALSE:
Trailers will have yellow ABS malfunction lamps on the right side of the trailers.
False

When you drive a tractor-trailer combination with ABS, you should…
Brake as you always have.

TRUE OR FALSE:
If your ABS malfunctions, you will loose your brakes
False

TRUE OR FALSE:
ABS makes it possible to drive faster more safely.
False

The 5th wheel, when coupling, must be:
Properly greased
Tilted down toward the rear of the tractor
Have unlocking handles in automatic lock position

When coupling, the tractor should be…
Directly infornt of the trailer.

When coupling you should back…
slowly

How do you know if the trailer is at proper height?
The trailer should be low enough that it is raised slightly by the tractor when the tractor is backed under it.

When coupling, you should back using…
The lowest reverse gear

How do you check for a secure connection?
Pull tractor gently while the trailer brakes are still locked to check that the trailer is locked on the trcator.

What might happen if the trailer is too high when you try to couple.
You will miss and not get a coupling.

After coupling, how much space should be between the upper and lower 5th wheel?
None

TRUE OR FALSE:
You should look into the back of the 5th wheel to see if it is locked into the kingpin.
True

TRUE OR FALSE:
To drive, you need to raise the landing gear only until it just lifts off the pavement.
False

How can you test that air flows to all trailers?
Go to the rear of the rig. Open the emergency line shut-off valve at the rear of the last trailer.
You should hear air escaping, showing the entire system is charged.

How can you test the tractor-protection valve?
Push in the «air supply» knob, step on and off the brake pedal several times to reduce the air pressure in the tanks.

How can you test the trailer emergency brakes?
Charge the trailer air brake system and check that the trailer rolls freely.
Then stop and pull out the trailer air supply control ( also called tractor protection valve )

How can you test the trailer service brakes?
At normal air pressure, release the parking brakes. Move the vehicle forward slowly, and apply trailer hand brake.

TRUE OR FALSE:
The tractor protection valve will pop when the pressure falls to 100 psi
False

TRUE OR FALSE:
The tractor protection valve will pop when the pressure falls between 20-45 psi.
True

It takes longer to stop an
empty vehicle

Jackknife will occur once the angle between the tractor and trailer reaches
15 degrees

Your 60 foot vehicle is traveling 45 mph: what is the proper following distance?
7 seconds

How far down the road should you look when driving?
12-15 seconds

The trailer air supply control
operates the tractor protection valve, in the event of rapid air loss, will cause the emergency brakes on the trailer to be applied.

The emergency air line is:
also called the supply line which supplies air to the trailer and controls the trailer emergency brakes.

You should use wheel chocks when:
trailer is not equipped with spring brakes or you are not sure if trailer has spring brakes.

Trailers with spring brakes do not need:
CHOCKS

The trailer hand valve
should never be used for braking when driving.

The following distance formula is:
1 sec for every 10 feet of length, plus 1 sec if speed is over 40 mph

The service air line is operated by:
brake pedal and trailer hand valve.

When pulling doubles, which unit is more likely to turn over:
Rear trailer

Landing gears should be cranked up high as they will go and the handle should be secured (true or false)
True

The heaviest trailer should always be the:
the lead trailer

The converter dolly is:
a device used to convert a semi trailer into a full trailer.

A loaded trailers landing gear when cranked down should:
be cranked a few extra turns after touching ground

When uncoupling and you are pulling tractor away from trailer, you should:
pull out smoothly and slowly and stop when fifth wheel is free but tractor frame is still under trailer.

When bobtailing, the glad hands should be secured in such a way as to:
prevent water from getting in them
prevent dirt from getting in them
prevent rubbing and chafing against other tractor parts

It is ok to use the trailer hand valve to park (true or false)
False

Air tanks should be drained
Daily

After coupling to a trailer:
raise landing gear slightly of the ground and then tug gently with the tractor to test connection
then crawl under trailer and visually check the connection.

The shut off valves must be in what position when pulling doubles:
lead trailer open, rear trailer closed, dolly air tank closed.

When dropping the rear trailer, you must:
Pull dolly out from under rear trailer before disconnecting from front trailer (safety)

Which part of the Kingpin should the locking jaws close around:
Shank

Glad hands are used to connect the:
Tractor service and emergency air lines to the trailers.

For a coupling to be complete, the safety catch for the fifth wheel locking lever must be:
Over the locking lever.

A trailer is most likely to jackknife when it is:
empty

If the spring brakes don’t release when you push the trailer air supply control, you should
Check the air line connections

When the trailer is connected:
make sure there is enough clearance between the tractor frame and the landing gear for turns.

When connecting to a trailer you hook up air supply lines then
supply air to the trailer system and pull out air supply knob to lock brakes, then back under to connect 5th wheel.

Why should a 5th wheel be properly greased
To prevent steering problems

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