Air Brakes Test Arkansas (2024) - FREE CDL Practice Test

1. The spring brakes come on:

when you lose ABS control.
when air pressure in both air brake systems rises to a value set by the manufacturer.
when you bring the vehicle to a complete stop right away.
when main air pressure is lost.

2. If you are being tailgated, you should:

move to the left lane.
speed up.
flash your brake lights.
increase your following distance.

3. Vehicles with air brake systems take longer to come to a complete stop than vehicles with hydraulic brakes because of:

4. Tractor and straight truck spring brakes will come fully on when the air pressure drops to a range of:

5. Why must air tanks be drained?

The low boiling point of water reduces braking power.
Water can freeze in cold weather and cause brake failure.
Water and oil reduce the air pressure.
To keep from fouling the air compressor oil.

6. Weight that is loaded so there is a high center of gravity:

reduces the chance that the load will shift to the side or fall off.
makes a vehicle easier to handle.
causes greater chance of rollover.
All of the above.

7. If you're feeling tired while driving you should:

drink coffee.
increase your speed to get to your destination quicker.
eat something.
stop driving and get some rest.

8. Too little weight on the driving axles can cause:

9. If you must drive through a deep puddle you should:

start slowly and Speed up smoothly and gradually so the vehicle does not jerk.
apply the brakes until your speed reaches 40 mph.
speed up to get through the puddle as quickly as possible.
slow down and place transmission in a low gear.

10. The air compressor governor controls:

when the air compressor will pump air into the air storage tanks.
when air tank pressure falls below the “cut-out” level.
the air pressure applied to the brakes.
the speed of the air compressor.

AIR BRAKES CDL PRACTICE TEST - ARKANSAS