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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 New York CDL knowledge test. The NY 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 New York CDL Manual. Take this NY CDL practice test now to prepare for the actual air brakes test!
1. To check the slack adjusters on S-cam brakes, you should:
park on level ground and fan off the air pressure by rapidly applying and releasing the foot brake.
release the parking brake valve and begin reducing the air pressure by stepping on and off the brake pedal.
park on level ground, chock the wheels and release the parking brakes, then use gloves and pull hard on each slack adjuster that you can reach.
All of the above.
2. Parking brakes are:
not required on commercial vehicles with air brakes.
required on all vehicles.
not required on trailers.
not required on buses.
3. When is it safe to leave your vehicle unattended without applying the parking brakes or chocking the wheels?
When the tank pressure falls to the "cut-in" pressure.
Only while you are taking a rest break.
When you are conducting your pre-trip inspection.
4. The air compressor stops pumping air into the air storage tanks when air tank pressure rises to around:
125 psi.
100 psi.
450 psi.
250 psi.
5. Which of the following is not part of the air brake system?
Air compressor
Air storage tanks
Air filter
Alcohol evaporator
6. If you are being tailgated, you should:
flash your brake lights.
move to the left lane.
speed up.
increase your following distance.
7. Most hydraulic brake failures occur for one of two reasons, one of which is:
excessive downshifting.
driving in cold weather.
loss of hydraulic pressure.
relying too much on the engine braking effect.
8. Most heavy vehicles require ________ change gears.
double clutching
double shifting
triple shifting
single clutching
9. When driving in hot weather, drivers should inspect tires:
every 2 hours or every 100 miles.
every hour or every 50 miles.
every 3 hours or every 75 miles.
every 4 hours or every 200 miles.
10. Which of the following is NOT part of the air brake system?
Service brake system
Emergency brake system
Anti-lock brake system
Parking brake system
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NY Air Brakes CDL Test

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