Free Montana CDL Air Brakes Practice Test 2023

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

Our CDL practice tests:
Based on 2021 MT commercial driver's license manual
Full answers + detailed explanations
Perfect for first-time, renewal applicants
MT CDL Air Brakes Test format:
25 questions
20 correct answers to pass
80% passing score
List of questions
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.
During normal driving, spring brakes are usually held back by:
An application pressure gauge shows how much air you are applying to the brakes. Increased application pressure to maintain the same speed indicates that __________.
Modern air brakes combine three different systems. They are the service, the parking, and the _____ brakes.
Parking or emergency brakes of trucks and buses can be legally held on by ____ pressure.
The most important thing to do when a low air pressure warning comes on is:
Your truck has a dual air system and one of the systems loses its pressure. What will happen?
The main factor in causing brake fade is:
Where is the modulating control valve located on some vehicles?
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?
What is the purpose of an antilock braking system (ABS)?
If you are driving down a steep downgrade and have reached your safe speed of 40 mph, you would apply the service brake until your speed dropped to ____ mph.
Under normal braking conditions, the vehicle:
Compared to hydraulic brakes, air brakes add how much distance to an average 55 mph stop?
In order to make contact with the brake drum, the brake pads and linings are pushed outward by the:
The most common problem found in roadside inspections is:
You should avoid using the parking brake when _______.
The service brake system ________.
How should the air leakage rate be tested?
Pushing the brake pedal down harder __________.
Brake drums should not have cracks longer than what length?
Air tanks should be drained:
Vehicles without automatic air tank drains need to be checked manually to remove ________?
Manual air tank drains require:
Vehicles with air brakes have pressure gauges connected to the _______.