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
The parking or emergency brake on a heavy vehicle can only be held in position by something that cannot leak away, like:
A driver needs to be able to see a warning when the air pressure in the service air tanks falls below ______.
An air compressor can be cooled by _______.
A low air pressure warning signal is ________.
The driver must be able to see a low air pressure warning which comes on before pressure in the service air tanks fall below ____ psi.
When is it OK to leave your truck unattended without applying the parking brakes and choking the wheels?
Your truck or bus has a dual air brake system. If a low air pressure warning comes on for only one system, what should you do?
To test the vehicle's service brakes, move the vehicle:
If your truck has a properly functioning dual air brake system and minimum size air tanks, the air pressure should build up from 85 to 100 psi within how many seconds?
If your vehicle has an alcohol evaporator, it is there to:
Brake fade is caused by:
When using a vehicle with air brakes, the parking needs to be used _______.
The parking brake knob is usually:
When brakes are applied, the brake shoes will press against the:
All of the following are factors in total stopping distance except:
If the low air pressure warning light comes on, you should:
The brake pedal in an air brake system _______.
Automatic air tanks _______.
In dual air systems, how long should it take air pressure to build 85 to 100 psi?
Initial air leakage rate for combination vehicles should be:
If the air compressor has its own oil supply you should do what before driving?
How often should alcohol containers be checked during cold weather?
Spring brakes are applied:
What is used to put alcohol into the system and reduce ice risk?
A warning to drivers behind you that the air brakes have been applied is the: