Free Idaho CDL Air Brakes Practice Test 2022

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

Our CDL practice tests:
Based on 2022 ID commercial driver's license manual
Full answers + detailed explanations
Perfect for first-time, renewal applicants
ID CDL Air Brakes Test format:
25 questions
20 correct answers to pass
80% passing score
List of questions
1.
The air compressor stops pumping air at what psi?
2.
The air brake lag distance at 55 mph on dry pavement adds about ____ feet.
3.
The 3 individual systems of the air brakes are the service brakes, emergency brake, and:
4.
On a long or steep downgrade, the foot brakes should be used:
5.
The ____ shows how much pressure is in the air tanks.
6.
The main factor in causing brake fade is:
7.
The application pressure gauge shows how much air pressure you:
8.
To stop the vehicle, air brakes systems use:
9.
When testing air leakage rates for single vehicles, initial loss rate should be less than:
10.
Which braking system applies and releases the parking brakes when you use the parking brake control?
11.
What should a driver do when the low air pressure warning signal comes on?
12.
When parking a vehicle with a modulating control valve ________.
13.
What type of brakes pushes a wedge between the ends of two brake shoes to stop the vehicle?
14.
If the low air warning comes on while you are driving, you should:
15.
If the low air pressure warning light comes on, you should:
16.
Besides heat, another cause of brake fade is:
17.
The S-cam:
18.
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:
19.
To stop the vehicle, the brake shoes and linings are pushed against:
20.
To test the parking brake, stop the vehicle, put the parking brake on, and:
21.
The brake pedal in an air brake system _______.
22.
In dual air systems, how long should it take air pressure to build 85 to 100 psi?
23.
If one air system is very low on pressure _______.
24.
Brake drums or discs _______.
25.
Vehicles with ABS have malfunction lamps that are what color?