Air Brakes CDL Test - FREE New Hampshire CDL Practice Test

1. If you are feeling sleepy, you should:

2. Air storage tanks:

are installed in the first tank the air compressor pumps air to.
use parts of the service brake systems to stop the vehicle in a brake system failure.
pump air into the air storage tanks.
hold compressed air for the brakes.

3. If you get stuck on railroad tracks, you should:

get out of the vehicle and away from the tracks.
have a helper push your vehicle.
stay in the vehicle and call for help.
check the engine compartment quickly.

4. When backing, you should:

use the mirrors on both sides.
back and turn toward the right side whenever possible.
only use mirror on the driver's side.
back quickly.

5. Front wheel braking is good:

6. Brake lag is:

the distance your vehicle will continue to travel, in ideal conditions, before you hit the brakes.
the amount of air pressure required to stop the vehicle.
the time required for the air brakes to work after the brake pedal is pushed.
the distance your vehicle will travel, in ideal conditions, while you are braking.

7. Which of the following is not a braking system on a truck?

8. The ________ brake system applies and releases the brakes when the driver uses the brake pedal during normal driving.

9. When going down a steep downgrade, you should:

use a low gear, and a proper braking technique.
use the parking brake.
use escape ramps whenever possible.
avoid braking and rely on engine braking.

10. Excessive use of the service brakes results in overheating. Too much heat can:

cause the brakes apply unevenly.
make the brakes stop working.
cause the brakes to squeak.
cause the brakes to grab.

NH CDL AIR BRAKES PRACTICE TEST