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
To test air service brakes you should:
Your truck or bus has a dual air brake system. If a low-pressure warning comes on for only one system, what should you do?
The stop light switch:
Air tanks need to be drained ______.
Modern air brakes combine three different systems. They are the service, the parking, and the _____ brakes.
An air brake system is fully charged at what psi?
In case of a low air situation, the spring brakes should come on at:
What negatively affects the braking power of a spring brake?
When testing air leakage rates for single vehicles, initial loss rate should be less than:
When the safety valve releases air this indicates ___________.
Another name for the brake pedal is the "foot valve", or:
When the mechanical arm of a wig wag drops into your view that means the pressure in your system has dropped below what psi?
In most newer vehicles, the parking brake control will be:
If the low air warning comes on while you are driving, you should:
Spring brakes will come on automatically, but the parking brake can also be applied:
Why is manually adjusting automatic slack adjusters dangerous?
The parking brake should not be used when wet in freezing temperatures, or:
To stop the vehicle, the brake shoes and linings are pushed against:
In case of air pressure loss, a mechanical means of preventing the vehicle from moving is called:
The use of brakes on a long and steep downgrade under normal conditions is only a supplement to:
How does the antilock brake system benefit the driver?
In a dual air brake system, one system will typically control the rear brakes, and the other:
What does ABS stand for?
Required on all vehicles with air brakes, what tells the driver that air pressure is too low?
If your brakes are wet, what should you do to dry them quicker?