AIR BRAKES CDL PRACTICE TEST - NEW MEXICO

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!
1. The most common foundation brakes found on vehicles with air brakes are the:
wedge brakes.
disc brakes.
S-cam brakes.
2. Some air brake systems have an alcohol evaporator to:
reduce the stopping power of the vehicle.
reduce the danger of slipping.
prevent ice from forming in the brake system.
3. Perception Distance + Reaction Distance + Brake Lag Distance + Braking Distance = ?
Total Stopping Distance
Total Air Pressure
Stopping Distance - (minus) Brake Fade Distance
4. To avoid becoming a distracted driver you should:
adjust all vehicle controls and mirrors while driving.
not turn off all communication devices.
not engage in complex conversations with others.
5. Older trailers do not have spring brakes. If the air supply leaks away:
the ABS won't work properly.
the trailer will stop normally.
there will be no emergency brakes.
6. Typically an air system is fully-charged at:
125 psi
25 psi
75 psi
7. You are going down a steep grade. Once the vehicle is in the proper low gear, you should brake just hard enough to feel a slowdown, and then release the brakes when your speed has been reduced to ____ below your safe speed.
15 mph
5 mph
10 mph
8. To test the low pressure warning signal, you should:
shut the engine off when you have enough air pressure, turn the electrical power on and step on and off the brake pedal until the low air pressure warning signal comes on.
check the air hoses connected to the brake chambers to make sure they aren't cut.
pump the brakes while your vehicle is running.
9. When you apply the brakes, the brake shoes and linings are pushed against:
the supply pressure gauge.
the S-cam.
None of the above.
10. Before transporting sealed loads, you should check that:
the load is properly secured.
the seal numbers match the placard numbers.
the load can be inspected.
 
Page 1 of 3
Next page
NOT SURE YOU WILL PASS? GET CDL PREMIUM NOW! - Learn More

NM Air Brakes Test

Number of questions: 25
Correct answers to pass:20
Passing score:80%
Share This Online CDL Test
Rate this Air Brakes Test
4.8 out of 5
based on 256 votes