Free New Mexico CDL Air Brakes Practice Test 2022

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 2022 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
1.
The most common type of foundation brakes are:
2.
What can legally hold a parking or emergency brake in position for a truck, truck tractor, or bus?
3.
In case of emergency when driving a vehicle equipped with dual parking control valves, you should:
4.
The air brake lag distance at 55 mph on dry pavement adds about ____ feet.
5.
Excessive use of the service brakes results in overheating which can lead to:
6.
Why drain water from compressed air tanks?
7.
If you must make an emergency stop, you should brake so you:
8.
The low air pressure warning signal indicates:
9.
When should the spring brakes activate?
10.
Normally during anti-lock braking, the driver:
11.
When stab braking if you re-apply the brakes before the wheels start rolling, __________.
12.
If the air compressor should develop a leak, what keeps the air in the tanks?
13.
The safety valve reduces pressure at ___ psi.
14.
The manual adjustment of automatic slack adjusters is:
15.
How should you check that your service brakes are working properly?
16.
If air pressure is not built up within the correct amount of time, then:
17.
A device that limits the amount of air provided to the front brakes is a:
18.
The most common problem found in roadside inspections is:
19.
Controlled braking is only possible _________.
20.
The service brake system ________.
21.
Why should you check the brake adjustment often?
22.
Why do air brakes take longer to stop than hydraulic brakes?
23.
On large buses low pressure warning devices usually signal at ______.
24.
What is the purpose of a supply pressure gauge?
25.
Vehicles without automatic air tank drains need to be checked manually to remove ________?