AR CDL PRACTICE TEST - GENERAL KNOWLEDGE
21.
The tractor protection valve:
|
keeps air from going out if the air compressor develops a leak.
|
|
|
keeps air in the brake system should the trailer develop a bad leak.
|
|
|
prevents the trailer from being accidentally released.
|
|
|
keeps your wheels from locking up when you brake hard.
|
22.
When approaching a vehicle as part of a pre-trip inspection, the driver should look under the vehicle for all of the following except:
|
Windshield wiper fluid
|
|
|
Coolant
|
|
|
Fresh oil
|
|
|
Grease
|
23.
If your truck has automatic transmission, you should downshift:
|
whenever road conditions allow.
|
|
|
when you need to accelerate.
|
|
|
after entering a curve.
|
|
|
when going down grades.
|
24.
A tank endorsement is:
|
only required when transporting gases.
|
|
|
only required when transporting liquids.
|
|
|
not required when transporting hazardous materials.
|
|
|
required for both liquids and gases.
|
25.
An anti-lock braking system (ABS):
|
helps you avoid wheel lock up.
|
|
|
should help you steer around an obstacle while braking.
|
|
|
helps you avoid skids caused by over braking.
|
|
|
All of the above.
|
26.
To correct a drive-wheel skid, you should NOT:
|
Steer into the skid.
|
|
|
Push in the clutch.
|
|
|
Stop braking.
|
|
|
Countersteer.
|
27.
Which of the following is not part of the air brake system?
|
Air storage tanks
|
|
|
Alcohol evaporator
|
|
|
Air compressor
|
|
|
Air filter
|
28.
The best way to know what's going on behind and to the sides of your vehicle is to:
|
lean out of the window.
|
|
|
check your mirrors regularly.
|
|
|
ask your passenger(s).
|
|
|
use the rear view camera.
|
29.
Blocking _______________ to keep it from sliding.
|
is used only in the back of a piece of cargo
|
|
|
goes from the upper part of the cargo to the floor
|
|
|
is used in the front, back, and/or sides of a piece of cargo
|
|
|
None of the above.
|
30.
To test the service brake:
|
push the brake pedal firmly while slowly moving backward.
|
|
|
gently try to pull forward with the trailer parking brake on, then release the brake.
|
|
|
push the brake pedal firmly while going about 5 mph.
|
|
|
shift your transmission to a low gear, pump the brake pedal three times, then hold it down for five seconds.
|
Next page
NOT SURE YOU WILL PASS? GET CDL PREMIUM NOW! - Learn More