2026 Minnesota DMV Air Brakes Class B Test 2 (24 Questions And Complete Answers)
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Which of the following types of vehicles is most prone to the “crack-the-whip" effect?
1. An automobile
2. A three-axle tractor
3. A bobtail tractor
4. A triple combination
1. An automobile
2. A three-axle tractor
3. A bobtail tractor
4. A triple combination
A triple combination
Why do large vehicles use air brakes?
1. Other brake systems squeak too loudly.
2. Air braking systems are very effective.
3. Air brakes are complicated.
4. Air is free.
1. Other brake systems squeak too loudly.
2. Air braking systems are very effective.
3. Air brakes are complicated.
4. Air is free.
Air braking systems are very effective.
When driving while pulling trailers, you should:
1. Make sudden turns with the steering wheel.
2. Avoid making sudden moves.
3. Push the accelerator to the floor when starting from a stop.
1. Make sudden turns with the steering wheel.
2. Avoid making sudden moves.
3. Push the accelerator to the floor when starting from a stop.
Avoid making sudden moves.
To prevent a rollover, cargo should be:
1. Placed near the front of a trailer.
2. Placed near the rear of a trailer.
3. Spread out on a trailer.
4. Loaded with most weight on the driver’s side of a trailer.
1. Placed near the front of a trailer.
2. Placed near the rear of a trailer.
3. Spread out on a trailer.
4. Loaded with most weight on the driver’s side of a trailer.
Spread out on a trailer.
Do not use the parking brake when parking if:
1. The brakes are very hot.
2. The brakes are very cold.
3. There is snow on the ground.
4. There is water on the ground.
1. The brakes are very hot.
2. The brakes are very cold.
3. There is snow on the ground.
4. There is water on the ground.
The brakes are very hot.
Rollovers are most likely to happen when:
1. Drivers turn too fast.
2. Driver turn too slowly.
3. It is windy.
4. It is raining.
1. Drivers turn too fast.
2. Driver turn too slowly.
3. It is windy.
4. It is raining.
Drivers turn too fast.
When a combination vehicle goes around a corner:
1. The vehicle must use at least two lanes.
2. The front and rear wheels will move in different paths.
3. It is best to allow the rear wheels to drive over the curb.
1. The vehicle must use at least two lanes.
2. The front and rear wheels will move in different paths.
3. It is best to allow the rear wheels to drive over the curb.
The front and rear wheels will move in different paths.
When starting a vehicle with dual air brakes, pressure of ____ should be built up in the system before it is driven.
1. 10 psi
2. 25 psi
3. 100 psi
4. 200 psi
1. 10 psi
2. 25 psi
3. 100 psi
4. 200 psi
100 psi
Trailers built before 1975 are:
1. Required to have spring brakes.
2. Not required to have spring brakes.
3. Unsafe to drive.
4. Prohibited from public roadways.
1. Required to have spring brakes.
2. Not required to have spring brakes.
3. Unsafe to drive.
4. Prohibited from public roadways.
Not required to have spring brakes.
Emergency brakes are:
1. Not required on trucks.
2. Only required on trailers.
3. Required on tractors.
4. Only required when transporting hazardous materials.
1. Not required on trucks.
2. Only required on trailers.
3. Required on tractors.
4. Only required when transporting hazardous materials.
Required on tractors.
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