PA CDL GENERAL KNOWLEDGE TEST - CDL PRACTICE TEST

21. Which of the following is NOT one of the four a basic skills needed to operate a commercial vehicle?
Ability to back the vehicle safely
Ability to accelerate
Ability to steer
Ability to multitask while driving
22. Black ice is:
ice that makes the road look dry.
a thin layer of black ice.
a thick layer of ice.
None of the above.
23. The air compressor is connected to:
the suspension system.
the transmission.
the engine.
the radiator.
24. Anti-lock brakes:
reduce the perception distance.
help you stop faster.
increase your stopping distance.
keep your brakes from locking up when you brake hard.
25. The most important hand signal you should agree on with a helper is:
Go
Slowly
Stop
Keep backing
26. ABS:
helps increase brake pressure.
is not required on newer trucks.
causes your wheels to lock when you break hard.
gives you more control when you brake.
27. When traction is poor, as in rain or snow, you should speed up very gradually. If you don't:
the brakes will not work.
brake pressure will push the rod out.
you could lose control.
you will exceed the speed limit.
28. When backing a trailer, turn the wheel right to make the cab go ________ and the trailer go ________.
left; right
right; right
right; left
left; left
29. when you apply the service brake at 5 mph, which of the following might indicate a problem?
The vehicle stops when the brake is applied.
The vehicle pulls to one side or the other.
The tongue/draw-bar is not bent.
All the other answers are correct.
30. If your brakes fail on a steep mountain downgrade, you should:
stay on the road and keep looking for the next available escape ramp.
set the parking brake and park in an open area.
slow down until your vehicle comes to a complete stop.
decide what to do as soon as you know your brakes do not work.
Next page
NOT SURE YOU WILL PASS? GET CDL PREMIUM NOW! - Learn More