# 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
Perfect for first-time, renewal applicants
MT CDL Air Brakes Test format:
25 questions
80% passing score
List of questions
1.
The air compressor stops pumping air at what psi?
2.
Your truck or bus has a dual air brake system. If a low-pressure warning comes on for only one system, what should you do?
3.
Under normal conditions, in order to engage the parking brakes the driver should:
4.
Total stopping distance for air brakes is longer than that for hydraulic brakes due to ______ distance.
5.
Excessive heat caused by using your brakes too often can also cause:
6.
In a controlled braking emergency:
7.
The ____ shows how much pressure is in the air tanks.
8.
Normally during anti-lock braking, the driver:
9.
When should the spring brakes activate?
10.
When performing the controlled braking method for an emergency stop, you are _________.
11.
Another name for the brake pedal is the "foot valve", or:
12.
When checking the low pressure warning signal, it should turn on before the pressure drops below what psi?
13.
"Some air brake systems have an alcohol evaporator. What may happen if you don’t keep the proper level of alcohol?"
14.
All of the following are factors in total stopping distance except:
15.
If your truck has a dual air brake system, and one of the systems is low on pressure:
16.
17.
Average stopping distance under normal conditions at 55 mph is:
18.
If your vehicle has an alcohol evaporator, every day during cold weather you should:
19.
On newer vehicles, the parking brake control knob is typically yellow, but on older vehicles, the parking brake might be what color?
20.
If the air compressor has its own oil supply you should do what before driving?
21.
During a normal drive, the spring brakes are held back by _____.
22.
Vehicles with air brakes _________.
23.
To check the air compressor governor's "cut in" and "cut out" pressures you need to _________.
24.
What is used to put alcohol into the system and reduce ice risk?
25.
What is an alternative name for a brake pedal?