CDL GENERAL KNOWLEDGE TEST (LA) - PRACTICE TEST

21. When driving a modern truck, the gear you should be in before starting down a hill is usually_____ the gear required to climb the same hill.
the same as
lower than
higher than
None of the above.
22. Most heavy-duty vehicles use:
solid brakes.
hydraulic brakes.
air brakes.
pressure brakes.
23. Which of the following is NOT one of the four a basic skills needed to operate a commercial vehicle?
Ability to multitask while driving
Ability to accelerate
Ability to steer
Ability to back the vehicle safely
24. When only the tractor has ABS:
there is an increased chance of jackknifing.
the brakes won't work as effectively as without ABS.
it will be much more difficult to maintain steering control.
there is less chance of jackknifing.
25. If you are traveling at 55 mph in a 30 foot vehicle, how many seconds of following distance should you have?
2 seconds
3 seconds
4 seconds
5 seconds
26. The air tanks should be drained completely to remove:
the radiator cap.
carbon monoxide.
air.
water and oil.
27. _________ can make vehicle handling unsafe.
ABS
Poor weight balance
Dry roads
Poor ventilation
28. What factors can cause brakes to fade?
Gravel and tar.
Slippery surfaces and shaded areas.
Dirt roads and in unpaved yards.
Excessive heat and brakes out of adjustment.
29. You can determine if your vehicle is equipped with ABS (anti-lock braking system) by:
checking for a yellow ABS malfunction lamp on the instrument panel.
checking if your vehicle was manufactured after March 1, 1998.
looking for wheel speed sensor wires coming from the rear of your brakes.
All of the above.
30. Which of the following will not prevent distracted driving?
Clearing the vehicle of any unnecessary objects.
Planning your route before you begin driving.
Using your phone only when there is no traffic around you.
Pre-programming radio stations.
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