Free Missouri CDL Air Brakes Practice Test 2022

Do you need an Air Brakes endorsement or an L endorsement for your commercial driving license? The Missouri 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 Missouri CDL Book. 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 Missouri CDL Practice Test to get ready to pass the Missouri CDL Air Brake Test now. 

Our CDL practice tests:
Based on 2022 MO commercial driver's license manual
Full answers + detailed explanations
Perfect for first-time, renewal applicants
MO CDL Air Brakes Test format:
25 questions
20 correct answers to pass
80% passing score
List of questions
1.
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.
2.
On a long or steep downgrade, the foot brakes should be used:
3.
Your brakes are fading when:
4.
The application pressure gauge shows how much air pressure you:
5.
If you must make an emergency stop, you should brake so you:
6.
Normally during anti-lock braking, the driver:
7.
When testing air leakage rates for single vehicles, initial loss rate should be less than:
8.
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?
9.
When increased application pressure to maintain the same speed becomes necessary, you should ______.
10.
Air governor cut-out should be at around:
11.
If you must make an emergency stop, you should brake so you:
12.
The parking brake knob is usually:
13.
What must the air pressure be, at minimum, in both parts of a dual air brake system?
14.
Air braking takes more time than hydraulic braking because:
15.
The emergency spring brake release knob is:
16.
A device that limits the amount of air provided to the front brakes is a:
17.
The use of brakes on a long and steep downgrade under normal conditions is only a supplement to:
18.
If you need to make an emergency stop, you should brake so that you can ________.
19.
Automatic adjusters should ________.
20.
Initial air leakage rate for combination vehicles should be:
21.
How does the antilock brake system benefit the driver?
22.
The belt of a belt-driven air compressor should be ________.
23.
The spring brakes of a tractor will come on when the air pressure falls within _______.
24.
What is an alternative name for a brake pedal?
25.
If your brakes are wet, what should you do to dry them quicker?