FREE Nebraska CDL Combination Test 2024 (Practice Test)

1. To stop a trailer skid, you should:

use the brakes to slow down.
release the brakes to get traction back.
use the trailer hand brake to straighten out the rig.
countersteer to get traction back.

2. A burning tire must be:

immediately removed from the vehicle.
cooled with water.
covered with cloth.
None of the above.

3. When parking a trailer without spring brakes, it is very important for safety that you use wheel chocks. Why?

The air could leak out of the trailer air tank, releasing its emergency brakes.
You may not notice a major leak in the service line until you try to put the brakes on.
if you don't use wheel chocks, supply air will be sent to the service line instead of going to charge the trailer air tanks.
None of the above.

4. Which of the following is NOT part of testing the trailer service brakes?

Moving the vehicle forward slowly.
Pushing in the trailer air supply knob.
Checking for normal air pressure.
Releasing the parking brakes.

5. If you have convex mirrors, be aware that:

everything appears smaller in a convex mirror than it would if you were looking at it directly.
objects seem closer than they really are.
objects may appear to be faster than they really are.
in a convex mirror objects appears larger than they really are.

6. Fully loaded rigs:

are just as likely to roll over as empty rigs.
are less likely to roll over than empty rigs.
are much more likely to roll over than empty rigs.
None of the above.

7. When backing a trailer, you should:

not back up in a straight line.
turn the steering wheel toward the direction you want to go.
pull-up frequently to reposition the vehicle.
avoid braking.

8. When inspecting the coupling, make sure the fifth-wheel jaws have closed around the:

9. If your trailer starts to skid, you should:

use the trailer hand brake (if you have one) to straighten out the rig.
accelerate slightly.
keep the rear of your vehicle close to the curb.
release the brakes to get traction back.

10. The two most important things that a driver can do to prevent a rollover when driving a combination vehicle are:

Keeping cargo near the center of the vehicle and driving slowly on turns
Driving slowly around turns and keeping the cargo as close to the ground as possible
Keeping cargo near the ground and driving slowly on the highway
Keeping cargo near center of vehicle and driving slowly on the highway

NE CDL COMBINATION TEST - PRACTICE TEST