FREE North Carolina Combination Practice Test (2023)

1. Rollovers happen when drivers:

2. If your vehicle thumps or vibrates heavily, it may be a sign that:

3. If a worker is close to the roadway in a work zone, you should:

pull off the road and stop.
drive at the posted speed limit.
drive on the shoulder.
reduce your speed below the posted speed limit.

4. At speeds below 40 mph, you should leave at least one second in front of you for each ___ feet of vehicle length.

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

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

6. Combination vehicles usually:

require more driving skill than single CMVs.
are easier to drive than single than single CMVs.
are shorter than single than single CMVs.
All of the above.

7. Fully loaded rigs:

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

8. When driving a combination vehicle, which of the following 2 things will help you prevent a rollover?

Keeping cargo near the ground and driving slowly on the highway.
Keeping cargo near the center of the vehicle and driving slowly on the highway.
Keeping cargo near the center of the vehicle and driving slowly on turns.
Keeping the cargo near the ground and driving slowly around turns.

9. When the tractor protection valve closes, the trailer _______ brakes will come on.

10. Dual tires:

should come in contact with each other whenever possible.
should not come in contact with each other.
should always come in contact with each other.
are dangerous.

CDL COMBINATION PRACTICE TEST NORTH CAROLINA