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 application pressure gauge shows how much air you are applying to the brakes. Increased application pressure to maintain the same speed indicates that __________.
Total stopping distance for air brakes is longer than that for hydraulic brakes due to ______ distance.
Spring brakes will generally come on at:
Your brakes are fading when:
With air brake vehicles, the parking brake should be used:
When you need to apply more pressure to help your brakes work normally effectively, this means that your brakes are fading. Which of the following can cause fading brakes?
When performing the controlled braking method for an emergency stop, you are _________.
If you must make an emergency stop, you should brake so you:
It is not safe to drive a vehicle that has brake drums with cracks that are longer than _____ of the width of the friction area.
If the spring brakes are on, when should you push the brake pedal?
What tells the driver how much air pressure is in the air tanks?
In case of emergency stops, drivers should:
With air brake vehicles, the parking brakes should be used:
Brake drums (or discs) must not have cracks longer than ____ the width of the friction area.
When inspecting the air brake system, what particular item in the engine compartment should the driver pay specific attention to?
Which of the following helps the stop light switch work?
In tractors and straight trucks spring brakes will come on fully when the air pressure drops to what range?
The air tanks must be drained because:
Brake linings should not be _______.
Stop light switches are necessary because ________.
The safety valve in the air compressor tank is set to open at _____.
Why should air tanks be drained completely?
Air tanks should be drained:
What is the function of a safety valve?
Vehicles with air brakes have pressure gauges connected to the _______.