NEW MEXICO CDL AIR BRAKES PRACTICE TEST
View instructions
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 Mexico CDL knowledge test. The NM 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 Mexico CDL Manual. Take this NM CDL practice test now to prepare for the actual air brakes test!
Not Sure You Will Pass?
Get a Pass Guarantee
Get a Pass Guarantee
UPGRADE TO CDL PREMIUM
1.
The s-cam:
|
pulls the brake shoes away from the drum.
|
|
|
forces the brake shoes away from one another and presses them against the inside of the brake drum.
|
|
|
helps ensure that air flows to all trailers.
|
2.
To test the service brake:
|
push the brake pedal firmly while going about 5 mph.
|
|
|
gently try to pull forward with the trailer parking brake on, then release the brake.
|
|
|
shift your transmission to a low gear, pump the brake pedal three times, then hold it down for five seconds.
|
3.
If your tires are hot, you should NOT:
|
drive until you correct the cause of the overheating.
|
|
|
stop to let the tires cool down.
|
|
|
let air out of the tires so the pressure goes back to normal.
|
4.
A dual air brake system:
|
has a single air brake system, which uses a single set of brake controls.
|
|
|
has two separate air brake systems, which use a single set of brake controls.
|
|
|
has two separate air brake systems, which use two separate sets of brake controls.
|
5.
If you must stop on a one-way or divided highway, place your warning devices:
|
10 feet, 50 feet, and 150 feet toward the approaching traffic.
|
|
|
100 feet, 200 feet, and 300 feet toward the approaching traffic.
|
|
|
10 feet, 100 feet, and 200 feet toward the approaching traffic.
|
6.
To check the slack adjusters on S-cam brakes, you should:
|
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.
|
|
|
park on level ground and fan off the air pressure by rapidly applying and releasing the foot brake.
|
7.
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:
|
1 psi for single vehicles and 3 psi for a combination of 2 vehicles.
|
|
|
2 psi for single vehicles and 5 psi for a combination of 2 vehicles.
|
|
|
3 psi for single vehicles and 4 psi for a combination of 2 vehicles.
|
8.
Which of the following is not part of the air brake system?
|
Air storage tanks
|
|
|
Air filter
|
|
|
Air compressor
|
9.
If you are being tailgated, you should:
|
avoid quick changes.
|
|
|
increase your following distance.
|
|
|
All of the above.
|
10.
After supplying air to the trailer brake system, you should check the brake system for crossed air lines by:
|
applying and releasing the trailer brakes and listening for the sound of trailer brakes.
|
|
|
shutting the engine off so you can hear the brakes.
|
|
|
All of the above.
|
Next page
NOT SURE YOU WILL PASS? GET CDL PREMIUM NOW! - Learn More
NM CDL Air Brakes Test
| Number of questions: | 25 |
| Correct answers to pass: | 20 |
| Passing score: | 80% |
Share This Online CDL Test
Save Time. Learn Faster.Ace Your CDL Test.
UPGRADE TO CDL PREMIUM
Rate this CDL Air Brakes Test