1 . The best way to recognize that your trailer has started to skid is by:

Seeing other drivers' faces.
Checking the trailer in your mirrors.
Feeling the trailer move.
Click Here
Full Cheat Sheet

2 . In a vehicle equipped with an automatic tractor protection valve, the valve will pop out when air pressure drops to a level between:

20 and 45 psi.
75 and 105 psi.
50 and 65 psi.
Take a FREE Practice Test Now

3 . Fully-loaded rigs:

Usually are very responsive to steering.
Are more likely to roll over than empty rigs.
Can stop quickly.
Take a FREE Practice Test Now

4 . Keeping cargo centered on a rig can:

Help you drive faster.
Prevent a rollover.
Make turns more dangerous.
Take a FREE Practice Test Now

5 . When you are pulling a trailer, the air supply control lever should be in its ____ position.

Emergency
Supply
Normal
Click Here
Full Cheat Sheet

6 . Trailers built before ____ are not required to have spring brakes.

1985
1975
1999
Take a FREE Practice Test Now

7 . What does an Anti-Lock Braking System (ABS) do?

It allows a vehicle's wheels to lock up.
It prevents a vehicle's wheels from locking up.
It makes turning a vehicle easier.
Take a FREE Practice Test Now

8 . If your vehicle gets stuck on railroad tracks, you should:

Sit in the cab and call for help.
Exit the cab and walk away from the tracks.
Motion for another driver to push your vehicle.
Take a FREE Practice Test Now

9 . If an air supply control is in its "emergency" position:

The vehicle will increase speed.
The trailer emergency brakes will be applied.
The air supply to the trailer will increase.
Click Here
Full Cheat Sheet

10 . Combination vehicles need extra space on the road because they:

Drive more slowly than other commercial motor vehicles.
Are heavier than other commercial motor vehicles.
Need more space to turn and stop than other commercial motor vehicles.
Take a FREE Practice Test Now

11 . The tractor protection valve:

Ensures that oil adequately lubricates the engine.
Protects the tractor from exceeding a set speed.
Keeps air in the truck braking system if the trailer develops a leak.
Take a FREE Practice Test Now
Study tip:

Reduce your study time from hours to minutes with a DMV exam “Cheat Sheet”

99.2% of people who use the cheat sheet pass the FIRST TIME

Click Here
Full Cheat Sheet

12 . A tractor protection valve:

Keeps air in a brake system if there is a bad leak.
Prevents a truck from being stolen.
Prevents a trailer from being accidentally released.
Take a FREE Practice Test Now

13 . If unsure if a trailer has an Anti-Lock Braking System (ABS), you can:

Look under the trailer for wheel speed sensors coming from the back of the brakes.
Remove a tire and look for the ABS sensor on the axle.
Assume it does have ABS.
Click Here
Full Cheat Sheet

14 . In a double or triple combination, the ____ trailer should be directly behind the cab.

Lightest
Heaviest
Smallest
Take a FREE Practice Test Now

15 . Having anti-lock brakes on only one axle:

Will not make a difference in braking.
Will provide increased control in braking.
Will likely cause the air brakes to malfunction.
Take a FREE Practice Test Now

16 . A driver should test the tractor protection valve by:

Pulling the yellow, diamond-shaped knob.
Releasing air with the brake pedal.
Unlocking the trailer doors.
Take a FREE Practice Test Now

17 . A trailer that is too high:

May not couple correctly.
Will couple securely.
Is not an issue.
Click Here
Full Cheat Sheet

18 . The trailer hand valve should be used:

To test the trailer brakes.
To check the connection between the trailer and tractor.
To accelerate.
Take a FREE Practice Test Now

19 . Older trailers are not equipped with spring brakes. This means that if the air supply for a vehicle's air braking system leaks away:

The trailer will stop normally.
The trailer will not have brakes.
The trailer will speed up.
Take a FREE Practice Test Now

20 . If the emergency air line loses pressure:

The Anti-Lock Braking System will activate.
The service air line will activate.
The emergency brakes will activate.
Take a FREE Practice Test Now