FREE Nebraska CDL Doubles Triples Practice Test (2024)

1. If your ABS fails:

you will have no brake function, and could lose control.
your tires might grab unexpectedly and you could lose control.
you will still have normal brake functions.
the first step is to get the vehicle off the road and stop.

2. You must have at least 4/32 inch tread depth in every major groove on front tires and at least ___ inch on other tires.

4/32
1/32
2/32
3/32

3. When driving with more than one trailer, the _______ trailer should be the first one behind the tractor.

lightest
heaviest
shortest
longest

4. In your mirror, you see a car approaching from the rear. The next time you check your mirror, you don't see the car. If you wish to change lanes, you should:

assume the car left the roadway and change lanes as normal.
ease into the other lane slowly so the other car can get out of the way.
wait until you are sure the car isn't in your blind spot.
None of the above.

5. After starting the engine, the ABS light stays on. This means:

the ABS oil level is not adequate.
the ABS is in Neutral.
the ABS is working properly.
the ABS is not working properly.

6. If there is a cargo fire in a van or box trailer, you should:

open the doors, especially if your cargo contains hazardous materials.
keep driving until you reach help.
enlist the help of bystanders.
keep the doors shut.

7. When more than one semitrailer is behind the tractor:

the lighter trailer should be in the rear.
the more heavily loaded trailer should be disconnected.
The order doesn't matter.
the more heavily loaded semitrailer should be in the rear.

8. When the trailer breaks away or develops a bad leak, the tractor protection valve will close automatically and:

the trailer emergency brakes will come on.
the tractor will lose all air pressure.
the engine will shut down.
the trailer supply valve will stay open.

9. Brake lag is:

the amount of air pressure required to stop the vehicle.
the distance your vehicle will travel, in ideal conditions, while you are braking.
the distance your vehicle will continue to travel, in ideal conditions, before you hit the brakes.
the time required for the air brakes to work after the brake pedal is pushed.

10. If a trailer does not have spring brakes, to keep the trailer from moving you should:

use wheel chocks.
park on a slight decline.
close the brake valve.
use the service brakes.

Number of questions:	20
Correct answers to pass:	16
Passing score:	80%

NEBRASKA CDL DOUBLES TRIPLES PRACTICE TEST

Doubles Triples NE CDL Test