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
Air brakes consist of ________.
What can legally hold a parking or emergency brake in position for a truck, truck tractor, or bus?
An air brake system is fully charged at what psi?
The supply pressure gauge shows how much pressure:
To make sure that the spring brakes come on automatically, do all of the following except:
To stop the vehicle, air brakes systems use:
When increased application pressure to maintain the same speed becomes necessary, you should ______.
When the mechanical arm of a wig wag drops into your view that means the pressure in your system has dropped below what psi?
What type of brakes pushes a wedge between the ends of two brake shoes to stop the vehicle?
If the low air warning comes on while you are driving, you should:
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 low air pressure warning light comes on, you should:
In a dual air brake system, the first system, supplying the rear brakes, is commonly known as the "primary" system, and the other as the:
In case of air pressure loss, a mechanical means of preventing the vehicle from moving is called:
With air brake vehicles, the parking brakes should be used:
The use of brakes on a long and steep downgrade under normal conditions is only a supplement to:
How are brakes designed?
The braking power of the spring brakes ______.
If your vehicle has an alcohol evaporator, the evaporator's purpose is to _____.
Initial air leakage rate for combination vehicles should be:
Automatic adjusters should ________.
Why should air tanks be drained completely?
On large buses low pressure warning devices usually signal at ______.
Typically, at what psi does the air compressor governor stop the compressor from pumping air?
On a long or steep downgrade, how should vehicle speed be primarily controlled?