2026 Montana DMV Air Brakes Class B Test 1 (25 Questions And Complete Answers)
1 / 25
Terms in this set
25
The air pressure in a dual air brake system should build from 85 to 100 psi within:
1. Two minutes.
2. 15 seconds.
3. 10 minutes.
4. 45 seconds.
1. Two minutes.
2. 15 seconds.
3. 10 minutes.
4. 45 seconds.
45 seconds.
What kind of brakes do most newer heavy-duty trucks use?
1. Single air brakes
2. Dual air brakes
3. Triple air brakes
1. Single air brakes
2. Dual air brakes
3. Triple air brakes
Dual air brakes
Anti-Lock Braking Systems (ABS):
1. Reduce a vehicle's normal braking capacity.
2. Are in addition to other braking systems and do not reduce a vehicle's braking power.
3. Are not effective on larger vehicles.
1. Reduce a vehicle's normal braking capacity.
2. Are in addition to other braking systems and do not reduce a vehicle's braking power.
3. Are not effective on larger vehicles.
Are in addition to other braking systems and do not reduce a vehicle's braking power.
What color are ABS malfunction lamps?
1. Orange
2. Yellow
3. Green
4. Blue
1. Orange
2. Yellow
3. Green
4. Blue
Yellow
During an inspection, slack adjusters on S-cam brakes should not move more than:
1. One foot.
2. One centimeter.
3. One inch.
1. One foot.
2. One centimeter.
3. One inch.
One inch.
A low air pressure warning signal should activate:
1. When tank pressure falls below 120 psi.
2. When tank pressure falls below 60 psi.
3. When tank pressure falls below 10 psi.
4. When tank pressure falls below 5 psi.
1. When tank pressure falls below 120 psi.
2. When tank pressure falls below 60 psi.
3. When tank pressure falls below 10 psi.
4. When tank pressure falls below 5 psi.
When tank pressure falls below 60 psi.
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.
The air storage tanks:
1. Hold only enough air for one braking cycle.
2. Hold enough air for the brakes to be used several times if the compressor stops working.
3. Do not hold air unless there is an emergency.
1. Hold only enough air for one braking cycle.
2. Hold enough air for the brakes to be used several times if the compressor stops working.
3. Do not hold air unless there is an emergency.
Hold enough air for the brakes to be used several times if the compressor stops working.
Before driving a vehicle with air brakes, you should ensure that the spring brakes come on automatically when'':
1. Air pressure falls below 45 psi.
2. Air pressure falls below 20 psi.
3. Driving downhill.
4. Driving uphill.
1. Air pressure falls below 45 psi.
2. Air pressure falls below 20 psi.
3. Driving downhill.
4. Driving uphill.
Air pressure falls below 45 psi.
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.
Showing the first 10 terms. Use the flashcard player above to study all 25 terms!