2026 Mississippi DMV Air Brakes Class A Test 1 (25 Questions And Complete Answers)
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The air entering air storage tanks may contain:
1. Water and compressor oil.
2. Frost.
3. Gravel.
4. Antifreeze.
1. Water and compressor oil.
2. Frost.
3. Gravel.
4. Antifreeze.
Water and compressor oil.
In cold weather, an alcohol evaporator should be checked and filled:
1. Once a week.
2. Every day.
3. Every hour.
4. Once a month.
1. Once a week.
2. Every day.
3. Every hour.
4. Once a month.
Every day.
While driving, ____ generally holds spring brakes in place.
1. Air pressure
2. Electricity
3. Gasoline
1. Air pressure
2. Electricity
3. Gasoline
Air pressure
During an applied leakage test, what is the maximum leakage rate that is safe for a single vehicle with air brakes?
1. 10 psi in one minute
2. 5 psi in one minute
3. 3 psi in one minute
1. 10 psi in one minute
2. 5 psi in one minute
3. 3 psi in one minute
3 psi in one minute
During an applied leakage test, the maximum leakage rate for a single vehicle with air brakes 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.
Air tank drains:
1. Should not be used in cold weather.
2. Are helpful to remove water and oil from the air tanks.
3. Are used to move air to the brakes.
4. Clean the air in the passenger compartment.
1. Should not be used in cold weather.
2. Are helpful to remove water and oil from the air tanks.
3. Are used to move air to the brakes.
4. Clean the air in the passenger compartment.
Are helpful to remove water and oil from the air tanks.
A low air pressure warning signal:
1. Is not recommended on vehicles with air brakes.
2. Is required on vehicles with air brakes.
3. Is optional on vehicles with air brakes.
1. Is not recommended on vehicles with air brakes.
2. Is required on vehicles with air brakes.
3. Is optional on vehicles with air brakes.
Is required on vehicles with air brakes.
When the brake pedal is depressed, air brakes work:
1. Immediately.
2. After a short delay.
3. After about a minute.
4. Only if the green lever on the control panel is pushed down.
1. Immediately.
2. After a short delay.
3. After about a minute.
4. Only if the green lever on the control panel is pushed down.
After a short delay.
If you’re driving and the ABS warning light comes on, it means:
1. The ABS is working properly.
2. The ABS has just been activated.
3. The ABS is not working properly.
4. The ABS needs to be activated.
1. The ABS is working properly.
2. The ABS has just been activated.
3. The ABS is not working properly.
4. The ABS needs to be activated.
The ABS is not working properly.
Truck tractors with air brakes built on or after March 1, 1997 must have':
1. An Anti-Lock Braking System (ABS).
2. Bluetooth.
3. A GPS.
1. An Anti-Lock Braking System (ABS).
2. Bluetooth.
3. A GPS.
An Anti-Lock Braking System (ABS).
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