2026 New Hampshire DMV Air Brakes Class B Test 1 (25 Questions And Complete Answers)
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When about to drive a vehicle with a dual brake system, a driver should:
1. Let the vehicle warm up to ensure the fuel reaches the engine.
2. Wait for air pressure to build in both the primary and secondary systems.
3. Begin driving just after the engine starts.
4. Pump the pedal about 20 times to build pressure, then begin driving.
1. Let the vehicle warm up to ensure the fuel reaches the engine.
2. Wait for air pressure to build in both the primary and secondary systems.
3. Begin driving just after the engine starts.
4. Pump the pedal about 20 times to build pressure, then begin driving.
Wait for air pressure to build in both the primary and secondary systems.
If your tractor is equipped with ABS but your trailer is not, the ABS:
1. Will not be effective.
2. Will still improve your steering control.
3. Will make jackknifing easier.
4. Will allow others to see when you brake.
1. Will not be effective.
2. Will still improve your steering control.
3. Will make jackknifing easier.
4. Will allow others to see when you brake.
Will still improve your steering control.
You should test the low pressure warning signal by:
1. Turning on the engine and applying the trailer hand brake.
2. Rapidly pressing and releasing the brake pedal.
3. Removing wheel chocks and disengaging the parking brake.
1. Turning on the engine and applying the trailer hand brake.
2. Rapidly pressing and releasing the brake pedal.
3. Removing wheel chocks and disengaging the parking brake.
Rapidly pressing and releasing the brake pedal.
To use the stab braking method, you should:
1. Apply the brakes completely until the wheels lock up, release the brakes until the wheels start rolling, then repeat the process.
2. Apply the brakes about halfway, but allow the wheels to keep rolling.
3. Apply the brakes completely until the wheels lock up and the vehicle stops.
4. Apply the emergency brake until the vehicle starts to slow.
1. Apply the brakes completely until the wheels lock up, release the brakes until the wheels start rolling, then repeat the process.
2. Apply the brakes about halfway, but allow the wheels to keep rolling.
3. Apply the brakes completely until the wheels lock up and the vehicle stops.
4. Apply the emergency brake until the vehicle starts to slow.
Apply the brakes completely until the wheels lock up, release the brakes until the wheels start rolling, then repeat the process.
Truck tractors with air brakes that were built on or after March 1, 1997 are equipped with:
1. An extra set of brakes.
2. Voice-activated brakes.
3. Cruise control.
4. Anti-Lock Braking Systems (ABS).
1. An extra set of brakes.
2. Voice-activated brakes.
3. Cruise control.
4. Anti-Lock Braking Systems (ABS).
Anti-Lock Braking Systems (ABS).
The air compressor governor controls:
1. When the air compressor pumps air into the air storage tanks.
2. How fast air is pumped into the air storage tanks.
3. The temperature of air pumped into the air storage tanks.
4. The speed of the vehicle.
1. When the air compressor pumps air into the air storage tanks.
2. How fast air is pumped into the air storage tanks.
3. The temperature of air pumped into the air storage tanks.
4. The speed of the vehicle.
When the air compressor pumps air into the air storage tanks.
When an S-cam turns inside a brake drum, the S-cam:
1. Presses the brake shoes against the inside of the brake drum.
2. Presses the brake shoes against the brake linings.
3. Presses the brake linings against the wheel axles.
1. Presses the brake shoes against the inside of the brake drum.
2. Presses the brake shoes against the brake linings.
3. Presses the brake linings against the wheel axles.
Presses the brake shoes against the inside of the brake drum.
The application pressure gauge:
1. Shows how much air pressure is being applied to the brakes.
2. Shows the temperature of air being used in the braking system.
3. Shows the pressure of the air coming from the compressor.
4. Shows the number of times the brakes have been used.
1. Shows how much air pressure is being applied to the brakes.
2. Shows the temperature of air being used in the braking system.
3. Shows the pressure of the air coming from the compressor.
4. Shows the number of times the brakes have been used.
Shows how much air pressure is being applied to the brakes.
Emergency brakes:
1. Are not required on trucks.
2. Are only required on trailers.
3. Are required on tractors.
4. Are optional.
1. Are not required on trucks.
2. Are only required on trailers.
3. Are required on tractors.
4. Are optional.
Are required on tractors.
Air brakes use ____ to function.
1. Compressed air
2. Liquid air
3. Nitrogen
1. Compressed air
2. Liquid air
3. Nitrogen
Compressed air
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