Free Minnesota CDL Air Brakes Practice Test 2022

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

Our CDL practice tests:
Based on 2022 MN commercial driver's license manual
Full answers + detailed explanations
Perfect for first-time, renewal applicants
MN CDL Air Brakes Test format:
25 questions
20 correct answers to pass
80% passing score
List of questions
1.
A driver needs to be able to see a warning when the air pressure in the service air tanks falls below ______.
2.
An air compressor can be cooled by _______.
3.
Modern air brakes combine three different systems. They are the service, the parking, and the _____ brakes.
4.
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.
5.
Parking or emergency brakes of trucks and buses can be legally held on by ____ pressure.
6.
The supply pressure gauge shows how much pressure:
7.
Your brakes are fading when:
8.
What negatively affects the braking power of a spring brake?
9.
Another name for the brake pedal is the "foot valve", or:
10.
Which braking system applies and releases the parking brakes when you use the parking brake control?
11.
In most newer vehicles, the parking brake control will be:
12.
When does the air compressor governor allow air to start pumping?
13.
If the low air warning comes on while you are driving, you should:
14.
The air compressor governor controls:
15.
Total stopping distance with air brakes is Perception distance + Braking Distance + Brake Lag Distance +:
16.
The manual adjustment of automatic slack adjusters is:
17.
A device that limits the amount of air provided to the front brakes is a:
18.
Controlled braking is only possible _________.
19.
The most common type of foundation brake is?
20.
If the air compressor has its own oil supply you should do what before driving?
21.
Air tanks should be drained:
22.
The parking brake should be used:
23.
A warning to drivers behind you that the air brakes have been applied is the:
24.
What is an alternative name for a brake pedal?
25.
Vehicles with air brakes have pressure gauges connected to the _______.