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 safety valve discharges automatically at the pressure of:
2.
At 55 mph on dry pavement, the air brake lag distance is how many feet?
3.
The supply pressure gauge shows how much pressure:
4.
Your brakes are fading when:
5.
Spring brakes will generally come on at:
6.
If you must make an emergency stop, you should brake so you:
7.
The low air pressure warning signal indicates:
8.
Normally during anti-lock braking, the driver:
9.
When should the spring brakes activate?
10.
When using a vehicle with air brakes, the parking needs to be used _______.
11.
If the air compressor should develop a leak, what keeps the air in the tanks?
12.
Why is manually adjusting automatic slack adjusters dangerous?
13.
The safety valve reduces pressure at ___ psi.
14.
The air compressor governor controls:
15.
After the initial pressure drop, air leakage for single vehicles should be less than:
16.
When inspecting the air brake system, what particular item in the engine compartment should the driver pay specific attention to?
17.
If you need to make an emergency stop, you should brake so that you can ________.
18.
The air compressor is connected to the engine through ______.
19.
How does the antilock brake system benefit the driver?
20.
Why do air brakes take longer to stop than hydraulic brakes?
21.
What is the purpose of a supply pressure gauge?
22.
What does ABS stand for?
23.
Manual air tank drains require:
24.
The warning light and buzzer will come on when the air pressure in either system drops below what psi?
25.
To test the parking brake you should _______.