In Partnership with Exeter Public Library

View instructions
The air brakes endorsement applies to applicants who wish to drive a vehicle with air brakes in Class A, B, or C CDL. To drive a vehicle with air brakes, you must pass the air brake component of the New Hampshire CDL knowledge test. The NH CDL air brakes test consists of 25 questions, and you'll need at least 20 correct answers to pass (80%). The test covers the information found in the air brakes section of the New Hampshire CDL Manual. Take this NH CDL practice test now to prepare for the actual air brakes test!
1. If you are feeling sleepy, you should:
slow down.
get some coffee.
pull off the road and rest.
drive faster.
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:
Never.
only in good weather.
under all conditions.
only in wet conditions.
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?
Emergency brake
Parking brake
Steering brake
Service brake
8. The ________ brake system applies and releases the brakes when the driver uses the brake pedal during normal driving.
parking
anti-lock
service
emergency
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.
 
Page 1 of 3
Next page

NH CDL Air Brakes Test

Number of questions: 25
Correct answers to pass:20
Passing score:80%
Share This Online CDL Test
Rate this CDL Air Brakes Test
4.6 out of 5
based on 154 votes