Free New Mexico CDL Air Brakes Practice Test 2023

Do you need an Air Brakes endorsement or an L endorsement for your commercial driving license? The New Mexico CDL Air Brake test has some differences from other endorsements because your license will receive a mark of restriction if you fail the test. So having good preparation before exam day is very necessary. To ensure that our questions are relevant, all of our CDL practice test packs are based on the New Mexico CDL Manual. Each question has a detailed explanation for you to thoroughly learn the format and the topic. Don't be afraid of having a restriction on your license. Let’s try our NM CDL Test to get ready to pass the New Mexico CDL Air Brake Test now. 

Our CDL practice tests:
Based on 2021 NM commercial driver's license manual
Full answers + detailed explanations
Perfect for first-time, renewal applicants
NM CDL Air Brakes Test format:
25 questions
20 correct answers to pass
80% passing score
List of questions
An automatic wig wag will rise out of your view when the pressure in your system rises above what psi?
The air loss rate for a straight truck or bus with the engine off and the brakes on should not be more than:
During normal driving, spring brakes are usually held back by:
The driver must be able to see a low air pressure warning which comes on before pressure in the service air tanks falls below ____ psi.
Emergency stab braking is:
On a long or steep downgrade, the foot brakes should be used:
When the engine is off and the parking brake released, a single vehicle air loss rate should be less than ________ psi in one minute.
To stop the vehicle, air brakes systems use:
Generally, air governor cut-in should be at:
What should a driver do when the low air pressure warning signal comes on?
When you need to depress the brakes harder and harder just to maintain the same speed this means ______.
If your truck or bus has dual parking control valves, you can use pressure from a separate tank to:
What is a \"Wig Wag\"
The level at which the air compressor stops pumping air is:
Which of these is NOT a proper time to apply the parking brakes?
Pressing and releasing the brake pedal unnecessarily:
In order to make contact with the brake drum, the brake pads and linings are pushed outward by the:
You should avoid using the parking brake when _______.
How are brakes designed?
The air compressor is connected to the engine through ______.
If air supply drops when driving, the tractor protection valve ________.
On newer vehicles, the parking brake control knob is typically yellow, but on older vehicles, the parking brake might be what color?
What does the air compressor governor control?
To check the air compressor governor's "cut in" and "cut out" pressures you need to _________.
The warning light and buzzer will come on when the air pressure in either system drops below what psi?