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CDL AIR BRAKES PRACTICE TEST - VERMONT

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The air brakes endorsement applies to applicants who wish to drive a vehicle with air brakes in Class A, B, or C CDL. To drive a vehicle with air brakes, you must pass the air brake component of the Vermont CDL knowledge test. The VT CDL air brakes test consists of 25 questions, and you'll need at least 20 correct answers to pass (80%). The test covers the information found in the air brakes section of the Vermont CDL Manual. Take this VT CDL practice test now to prepare for the actual air brakes test!
1. Antifreeze:
helps the engine under hot conditions as well as cold conditions.
helps the engine only when the temperature is below freezing.
helps the engine only under hot conditions.
2. Brake drums or discs must not have cracks longer than ____ the width of the friction area.
1/3
1/2
1/4
3. Brake fade results from:
excessive use of the service brakes.
excessive wear.
excessive speeding.
4. The maximum leakage rates per minute are ___ psi for single vehicles and ___ psi for a combination of 2 vehicles.
3; 4
5; 6
3; 2
5. If air doesn't flow all the way to the back:
your brakes will not work properly.
a rollover is more likely.
the trailer will tend to swing around.
6. If the air pressure gets too low:
the brakes will lock up.
the brakes will not work.
ABS will help maintain vehicle control.
7. If you get stuck on railroad tracks, you should:
have a helper push your vehicle.
get out of the vehicle and away from the tracks.
stay in the vehicle and call for help.
8. Before driving a vehicle with a dual air brake system, you should allow time for the air compressor to build up a minimum of ____ pressure in both the primary and secondary systems.
50 psi
100 psi
150 psi
9. An Anti-lock Braking System (ABS):
lets you drive faster.
keeps your wheels from locking up when you brake hard.
increases your normal braking capability.
10. To perform an applied leakage test, the vehicle’s air pressure should be built up to maximum pressure. Check the air gauge to see that the air pressure should drop no more than:
3 psi for single vehicles and 4 psi for a combination of 2 vehicles.
2 psi for single vehicles and 5 psi for a combination of 2 vehicles.
1 psi for single vehicles and 3 psi for a combination of 2 vehicles.
 
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VT CDL Air Brakes Test

Number of questions: 25
Correct answers to pass:20
Passing score:80%
Number of questions: 25
Correct answers to pass:20
Passing score:80%
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