2026 Missouri DMV Air Brakes Class B Test 2 (25 Questions And Complete Answers)
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Terms in this set
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Air brakes use ____ to function...
1. Compressed air
2. Liquid air
3. Nitrogen
1. Compressed air
2. Liquid air
3. Nitrogen
Compressed air
The two markings on a front brake limiting valve usually read:.
1. "Normal" and "slippery."
2. "Low" and "high."
3. "Left" and "right."
1. "Normal" and "slippery."
2. "Low" and "high."
3. "Left" and "right."
"Normal" and "slippery."
A slack adjuster should move no more than ____ from where it is attached to the push rod..
1. Two inches
2. Five inches
3. One inch
1. Two inches
2. Five inches
3. One inch
One inch
When experiencing cold weather, be sure to check your vehicle's alcohol evaporator:.
1. Every three hours.
2. Every day.
3. Every other week.
1. Every three hours.
2. Every day.
3. Every other week.
Every day.
When parking, you should not use the parking brake if:.
1. The brakes are very hot.
2. The brakes are very cold.
3. There is snow on the ground.
1. The brakes are very hot.
2. The brakes are very cold.
3. There is snow on the ground.
The brakes are very hot.
The leakage rate for a triple combination vehicle with air brakes should be no more than ____ in one minute during a static leakage test..
1. 8 psi
2. 5 psi
3. 3 psi
1. 8 psi
2. 5 psi
3. 3 psi
5 psi
Air tank drains should:..
1. Only be used by mechanics.
2. Only be used when it is wet outside.
3. Be used to drain the tanks completely.
1. Only be used by mechanics.
2. Only be used when it is wet outside.
3. Be used to drain the tanks completely.
Be used to drain the tanks completely.
Why should you regularly drain the air tanks..
1. Because the air gets old and needs to be replaced
2. Because compressed air contains some water and the water collects in the tanks
3. To allow for a change in pressure
1. Because the air gets old and needs to be replaced
2. Because compressed air contains some water and the water collects in the tanks
3. To allow for a change in pressure
Because compressed air contains some water and the water collects in the tanks
Having ABS on only one axle:.
1. Can be dangerous.
2. Still allows you additional control when braking.
3. Slows the vehicle, but cannot stop it.
1. Can be dangerous.
2. Still allows you additional control when braking.
3. Slows the vehicle, but cannot stop it.
Still allows you additional control when braking.
A ____ allows a driver to gradually apply spring brakes..
1. Modulating control valve
2. Trailer air supply control
3. Relay valve
1. Modulating control valve
2. Trailer air supply control
3. Relay valve
Modulating control valve
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