Air Brakes CDL Test - FREE Arkansas CDL Practice Test

1. If your brakes fail while you are driving on a downgrade, you should:

use an escape ramp if it's available.
immediately start looking outside your vehicle for something to stop it.
take the least hazardous escape route you can.
All of the above.

2. In vehicles with air brakes, water and compressor oil in the bottom of the air tank:

should be drained completely.
should not be removed.
should be added regularly.
None of the above.

3. Before driving a truck or bus with a dual air brake system, the minimum pressure in both the primary and secondary systems should be at least:

4. Pressing and releasing the brake pedal unnecessarily can:

apply more air pressure.
let air out faster than the compressor can replace it.
causes all the air to be lost.
causes friction, which slows the vehicle.

5. When using a fire extinguisher, you should stay:

as far away from the fire as possible.
at whatever distance you think is safe.
as close to the fire as possible, without getting burnt.
at least 10 feet away from the fire.

6. If stopped on a hill, how can you start moving without rolling back?

Partly engage the clutch before you take your right foot off the brake, put on the parking brake if necessary.
Release the parking brake before you have applied enough engine power to keep from rolling back.
Press on the gas pedal, even if you have to roll back a little.
None of the above.

7. Brake fade results from, and is affected by:

excessive heat caused by using the brakes too much.
excessive heat caused by not relying on the engine braking effect.
brakes out of adjustment.
All of the above.

8. When you apply the brakes, the brake shoes and linings are pushed against:

9. The stop light switch:

turns on the brake lights when you put on the air brakes.
should be used to fend off tailgaters.
warns you when the air supply pressure drops below 55 psi.
tells you when you need to use your parking brake instead of the service brake.

10. You should drain the air tanks completely. If water and oil collect in the air tanks:

your brakes could fail.
your brakes could become hard to press.
your brakes could heat up.
None of the above.

AR CDL AIR BRAKES PRACTICE TEST