2026 Massachusetts DMV Air Brakes Class A Test 2 (25 Questions And Complete Answers)
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When using the controlled braking method in an emergency situation, you should:
1. Apply the brakes as hard as possible without locking the wheels.
2. Apply the brakes with about half of your usual force.
3. Apply the brakes so the wheels lock.
4. Apply the brakes with minimal pressure.
1. Apply the brakes as hard as possible without locking the wheels.
2. Apply the brakes with about half of your usual force.
3. Apply the brakes so the wheels lock.
4. Apply the brakes with minimal pressure.
Apply the brakes as hard as possible without locking the wheels.
What can happen if parking brakes are used in very wet weather with temperatures below freezing?
1. The brakes will squeak.
2. The brakes may freeze so the vehicle cannot move.
3. The brakes may suddenly release by themselves.
4. The brakes may become too smooth to be used.
1. The brakes will squeak.
2. The brakes may freeze so the vehicle cannot move.
3. The brakes may suddenly release by themselves.
4. The brakes may become too smooth to be used.
The brakes may freeze so the vehicle cannot move.
The air entering air storage tanks may contain:
1. Water and compressor oil.
2. Frost.
3. Frost.
4. Antifreeze.
1. Water and compressor oil.
2. Frost.
3. Frost.
4. Antifreeze.
Water and compressor oil.
During a static leakage test, the maximum leakage rate for a double combination vehicle is:
1. 3 psi in one minute.
2. 6 psi in one minute.
3. 8 psi in one minute.
4. 4 psi in one minute.
1. 3 psi in one minute.
2. 6 psi in one minute.
3. 8 psi in one minute.
4. 4 psi in one minute.
3 psi in one minute.
Failing to drain the tanks in an air brake system can result in:
1. Water freezing and causing brake failure.
2. Squishy brakes.
3. Too much air collecting.
4. Too much fuel being carried.
1. Water freezing and causing brake failure.
2. Squishy brakes.
3. Too much air collecting.
4. Too much fuel being carried.
Water freezing and causing brake failure.
Air brakes are:
1. An effective tool for stopping large vehicles.
2. Prohibited on large vehicles.
3. Only effective in poor weather.
4. A tool to improve fuel efficiency.
1. An effective tool for stopping large vehicles.
2. Prohibited on large vehicles.
3. Only effective in poor weather.
4. A tool to improve fuel efficiency.
An effective tool for stopping large vehicles.
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.
A tank endorsement is:
1. Only required when transporting gases.
2. Only required when transporting liquids.
3. Used when transporting both liquids and gases.
4. Optional when transporting hazardous materials.
1. Only required when transporting gases.
2. Only required when transporting liquids.
3. Used when transporting both liquids and gases.
4. Optional when transporting hazardous materials.
Used when transporting both liquids and gases.
If the air pressure warning light comes on, you should:
1. Continue driving normally.
2. Activate your hazard lights and continue driving.
3. Call the local law enforcement agency.
4. Safely exit the roadway and stop.
1. Continue driving normally.
2. Activate your hazard lights and continue driving.
3. Call the local law enforcement agency.
4. Safely exit the roadway and stop.
Safely exit the roadway and stop.
What can happen if a parking brake is used in very wet weather when temperatures are below freezing?
1. The brakes will squeak.
2. The brakes may freeze so the vehicle cannot move.
3. The brakes may suddenly release by themselves.
4. The brakes may explode.
1. The brakes will squeak.
2. The brakes may freeze so the vehicle cannot move.
3. The brakes may suddenly release by themselves.
4. The brakes may explode.
The brakes may freeze so the vehicle cannot move.
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