Permit CDL test - Pronto CDL

Start Full Permit CDL Test

148

Created on July 20, 2021 By

Roman CDL

Permit CDL Tests

1 / 50

The brake pedal in an air brake system:

Is seldom used compared to the hydraulic system

Is connected to slack adjusters by a series of rods and linkages

Control the air pressure applied to put on the brakes

Control the speed of the air compressor

2 / 50

When driving at night, you should:

Drive faster when your low beams are on.

Look to the left side of the road when a vehicle is coming towards you

Adjust your speed to keep your stopping distance within your sight distance

Dim your lights within 300 feet of an oncoming vehicle

3 / 50

Which of these statements about backing a heavy vehicle is true?

It is safer to toward back the right side of the vehicle than toward the driver's side

Helpers should be out of the driver's sight and use only voice (spoken) signals for communicating with the driver

You should avoid backing whenever you can

All of these: You should avoid backing whenever you can, Helpers should be out of the driver's sight and use only voice (spoken) signals for communicating with the driver, It is safer to toward back the right side of the vehicle than toward the driver's side.

4 / 50

The tractor protection valve will close, and the trailer emergency brakes will come on when there is a major leak in the _________ brake line.

Parking

Emergency

Service

5 / 50

If the service line comes apart while you are driving a combination vehicle but the emergency line stays together, what will happen right away?

Nothing likely happens until you try to apply the brakes

The emergency trailer brakes will come on

The trailer's tank will exhaust through the open line

The emergency tractor brakes will come on

6 / 50

An air brake system is fully charged at what PSI?

125

100

7 / 50

Which of these statements about using turn signals is true?

When turning, you should signal early

You should use your turn signal to mark your vehicle when it is pulled off the side of the road

When turning, you should cancel the signal just before you make the turn

You do not need to use your turn signal when changing lanes in traffic on a four-lane highway

8 / 50

During normal driving, spring brakes are usually held back by:

Spring pressure

Air pressure

Centrifugal force

Bolts or clamps

9 / 50

What keeps an engine cool in hot weather driving

High-speed driving to put more air into the radiator

Use of air conditioner

Enough engine oil

10 / 50

When brakes are applied the brake shoes will align to press against the:

Brake drum or disk

S-cam

Slack adjuster

11 / 50

Most serious skid results from:

Turning too sharply

An uneven load

Driving too fast for road condition

12 / 50

What is counter-steering?

Using a steering axle brakes to prevent oversteering

Returning the steering wheel to the correct position after maneuvering or avoiding a traffic Emergency

Turning the steering wheel counterclockwise

Steering in the opposite direction from what other drivers expect you to

13 / 50

For your safety, when setting out reflective triangles you should:

Hold the triangles between yourself and oncoming traffic

Turn on your flasher

Carry the triangle at your sight

Keep them out of sight while you walk to the spots where you set them out.

14 / 50

When connecting the glad hands, you need to press the two seals with the couple together at what degree to each other?

180 degree

45 degree

90 degree

15 / 50

As the blood alcohol concentration (BAC) goes up, what happens

The drinker more clearly sees how alcohol is affecting him/her

The effects of alcohol decrease

The drinker can sober up in less time

Judgment and self-control are affected

16 / 50

You should always turn on your emergency four-way flashers when you:

Park on the side of the road

Drive through the mountains

Cross railway tracks

17 / 50

There are two things that a driver can do to prevent a rollover. They are: (1) keep the cargo as close to the ground as possible, and (2):

Make sure that the brakes are properly adjusted

Keep the fifth wheel free play tight

Go slow around turns

Keep both hands firmly on the steering wheel

18 / 50

To avoid an accident you moved to the shoulder. What should you do to return to the road?

Using mirrors and turn signals return when the road is clear

Ride on the shoulder to the next exit and then re-enter the road

Using mirrors and turn signals turn sharply to get back on the road

19 / 50

The proper use of the brake when going down a long steep grade after selection a proper gear is to brake until your speed is above ___ MPH below the posted speed for safety and release you brake.

5 mph

15 mph

10 mph

20 / 50

If your brakes fail on a downhill, first you must:

Hit some object to stop your vehicle

Look outside of your vehicle for another means of slowing your vehicle

Find an escape ramp to exit the roadway

21 / 50

You have a major leak in the service line, and you put on brakes. Service air will escape and cause the

Trailer's tank pressure to be lost

Trailer's tank pressure to go to the tractor's system

Trailer's emergency brakes to come on

Tractor's spring brakes to lock up

22 / 50

If you cannot make a turn without entering another traffic lane:

You should turn wide when you start a turn.

You should not take a turn and move to another place where you can make a turn without crossing other lines.

You should turn wide as you complete the turn

23 / 50

When checking the trailer emergency brakes, the tractor protection control valve should be placed in what position?

Neutral

Emergency

Normal

24 / 50

How do you correct a rear-wheels acceleration skid?

Apply the brakes

Stop accelerating

Apply more power to the wheels

Downshift

25 / 50

Which of these statements about a hazard of the vehicle fire is true?

Poor cargo ventilation may cause cargo to catch fire

Carrying a fully charged fire extinguisher may prevent a fire

An underinflated tire does not cause a vehicle fire

26 / 50

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?

Begin light braking

Quickly steer onto the shoulder

Stay off the brake until the vehicle has slowed down

Begin emergency braking

27 / 50

When driving a set of doubles, it is necessary to close which shut-off valve in the last trailer?

Back

Middle section

Front

28 / 50

Which of these tell you that the shipment contains hazardous materials?

Four-inch diamond shaped tag on a containers

All of these: Hazardous class in a shipping paper, Four-inch diamond shaped tag on containers, Hazardous materials placards.

Hazardous materials placards

Hazardous class in a shipping paper

29 / 50

Which of these would not help if windshield covered with ice?

Windshield wipers

Defroster

Scraper

30 / 50

Before you back under the trailer, make sure that:

The air brakes are off

The supply knob is in

The tractor protection valve is normal

The trailer brakes are locked

31 / 50

After you supply air to the trailer, make sure the air lines are not crossed, and the trailer brakes are working. This is done by:

Turning on the parking brakes from the cab

Watching your mirrors to if the trailer lights come on

Lifting brake pedal

Applying and releasing the trailer brakes and listening for the sound of the brake

32 / 50

When backing a tractor under a trailer, you should:

Always approach the trailer at a slight angle

Always use the lowest reverse gear

Do it quickly to ensure that the kingpin is locked into the fifth wheel

33 / 50

According to the driver's manual, why you should limit the use of your horn?

The horn is not a good way to let others know you are there

It can startle other drivers

On a vehicle with air brakes, it can use air pressure that may be needed to stop

You should keep both hands tightly gripping the steering wheel at all time

34 / 50

The air compressor governor controls:

The speed of the air compressor

When air is pumped into the air tanks

Air pressure applied to the brakes

When the brake chambers release pressure

35 / 50

The most common type for foundation brake found on the heavy vehicle is the:

S-cam drum

Wedge drum

Disc

None of this

36 / 50

You are coupling a tractor to a semitrailer and have backed up but are not under it. What should you hook before back under?

The ground cable

Nothing. wheel

The emergency and service air lines

Back up and lock the fifth The electrical service cable

37 / 50

Sometimes you need to leave a road to avoid a hazard or an emergency. When you do so you should keep in mind that:

You must be unable to reenter the road because of the gravel used on shoulders

It is less dangerous to drive on to shoulder than to make a collision

Most shoulders are not strong enough to support heavy vehicle

38 / 50

When loading a trailer if the load is loaded all to the rear, it may result in:

Poor traction on drive wheels

Damage to the steering axle

Wheel lockup

None of these

39 / 50

Which of these is NOT a danger when an automatic transmission is forced into a low gear at a high speed?

A loss of engine braking effect

Damage to the transmission

A loss of steering control

40 / 50

You are driving a 40-feet vehicle at 55 mph. The road is dry, and visibility is good. What is the least amount of space that you need to have in front of your vehicle to be safe?

4 seconds

5 seconds

6 seconds

41 / 50

Modern air brake systems combine three different systems. They are the service, the _________ brakes.

Foot

S-cam

Drum

Emergency

42 / 50

You are driving a long vehicle that makes wide turns. You want to turn left from Pine Street on to Cedar Street. Both are two-lane two-way streets. You should:

Begin turn with your vehicle in the left lane of Pine Street

Turn into the left lane of Cedar Street and then move to the right lane when the traffic is clear

Begin turn you as soon as enter the intersection

Begin turning your vehicle when you are halfway through the intersection

43 / 50

What is the proper way to hold a steering wheel?

With both hands close together, near the bottom of the wheel.

With both hands on opposite sides of the wheel.

With both hands close together, near the top of the wheel.

With one hand.

44 / 50

When is it OK to leave your truck unattended without applying the parking brakes and choking the wheels?

If you are only away for a few minutes

If you are conducting a pre-trip inspection

Never

45 / 50

If a coolant container is a part of the pressurized system, which of these is true:

You never need to check the level coolant of such a system.

You can check the coolant level when the engine is hot.

46 / 50

Stab braking should not be used on a vehicle with:

Hazardous materials

Trailers

Antilock brakes

47 / 50

If you must make an emergency stop, you should brake so you:

Can steer and so your vehicle stay a straight line

Use the handbrake before the brake pedal

Do not need to worry about steering

48 / 50

When driving through a work zone, you should:

Turn on your parking lights

Reduce your speed only if workers are close to the roadway

Watch for sharp drop off

49 / 50

Which of these would tell you that a shipment contains hazardous materials?

The name of hazard class on the shipping paper

A hazardous material placards on the vehicle

All of these are true: The name of hazard class on the shipping paper, A four-inches, diamond- shaped hazardous materials label on the container, A hazardous material placards on the vehicle.

A four-inches, diamond-shaped hazardous materials label on the container

50 / 50

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?

Stopping is always the safest action in a traffic emergency.

Unbuckle your safety belt before impact so you will not be trapped inside your vehicle.

You can almost always turn to miss an obstacle more quickly than you can stop.

Leaving the road is always risky than hitting another vehicle.

Your score is

The average score is 74%