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.
What can legally hold a parking or emergency brake in position for a truck, truck tractor, or bus?
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.
When inspecting air brakes:
4.
A low air pressure warning signal is ________.
5.
During normal driving, spring brakes are usually held back by:
6.
When increased application pressure to maintain the same speed becomes necessary, you should ______.
7.
In most newer vehicles, the parking brake control will be:
8.
Air braking takes more time than hydraulic braking because:
9.
The emergency spring brake release knob is:
10.
The manual adjustment of automatic slack adjusters is:
11.
After the initial pressure drop, air leakage for combination vehicles should be less than:
12.
In case of emergency stops, drivers should:
13.
With air brake vehicles, the parking brakes should be used:
14.
The use of brakes on a long and steep downgrade under normal conditions is only a supplement to:
15.
Why does a heavily loaded vehicle need a longer distance to stop?
16.
Automatic air tanks _______.
17.
At minimum, a dual air system should build up to what psi in the primary and secondary systems?
18.
If your vehicle has an alcohol evaporator, the evaporator's purpose is to _____.
19.
If air supply drops when driving, the tractor protection valve ________.
20.
The belt of a belt-driven air compressor should be ________.
21.
Air tanks should be drained:
22.
Typically, at what psi does the air compressor governor stop the compressor from pumping air?
23.
What is the purpose of an air storage tank?
24.
On a long or steep downgrade, how should vehicle speed be primarily controlled?
25.
Required on all vehicles with air brakes, what tells the driver that air pressure is too low?