CDL PRACTICE TEST - GENERAL KNOWLEDGE (NORTH CAROLINA)

11. Under-loaded front axles can:
make the steering axle weight too light to steer safely.
cause the drive wheels to spin easily.
cause poor traction.
All of the above.
12. When steering to avoid a crash, you should:
lock your wheels while turning.
not turn any more than needed to clear the hazard.
apply the brake while you are turning.
accelerate and steer at the same time.
13. The one-way check valve:
keeps air from going out if the air compressor develops a leak.
keeps the axles in place.
supplies air to the trailer air tanks.
keeps your wheels from locking up when you brake hard.
14. When driving, you should check your mirrors:
every 4 seconds.
regularly.
only when there may be a problem.
every 10 seconds.
15. Objects that have fallen on the road:
can damage electrical and brake lines.
can be a danger to your tires and wheel rims.
can be hazards.
All of the above.
16. When driving through a construction zone, you should:
maintain your speed, unless there are people working on or near the roadway.
watch for pavement drop-offs.
turn on your parking lights.
immediately come to a full stop and check for pedestrians.
17. Which of the following is a common cause of truck fires?
Under-inflated tires and duals that touch.
Short circuits due to loose connections.
loose fuel connections.
All of the above.
18. Empty trucks have the best braking. True or False?
True.
False.
It depends on the truck.
It depends on the cargo.
19. The most important way to see the sides and rear of your vehicle is to:
look out the window.
get out and walk around the vehicle.
look at your line of travel.
check your mirrors regularly.
20. Rough acceleration can cause:
tire damage.
damage electrical and brake lines.
mechanical damage.
All of the above.
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