# Free Hawaii CDL Air Brakes Practice Test 2023

Do you need an Air Brakes endorsement or an L endorsement for your commercial driving license? The Hawaii 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 Hawaii CDL practice test questions are relevant, all of our practice questions are based on the Hawaii 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 with our CDL practice test to get ready to pass the Hawaii CDL Air Brake Test now.

Our CDL practice tests:
Based on 2021 HI commercial driver's license manual
Perfect for first-time, renewal applicants
HI CDL Air Brakes Test format:
25 questions
80% passing score
List of questions
1.
An air compressor can be cooled by _______.
2.
The stop light switch:
3.
All air brake equipped vehicles have:
4.
The proper use of the brakes when going down a long steep grade after selecting a proper gear is to brake until your speed is about ____ below the posted speed and release your brake.
5.
Parking or emergency brakes of trucks and buses can be legally held on by ____ pressure.
6.
The brake system that applies and releases the brakes when the driver uses the brake pedal is the ________ brake system.
7.
The type of brakes that clamp the rotor between the brake shoes is:
8.
When should the spring brakes activate?
9.
When you release the brakes and reduce the air pressure what makes up for that air loss?
10.
Air governor cut-out should be at around:
11.
To check the free play of manual slack adjusters of S-cam brakes, you should park on:
12.
What is a \"Wig Wag\"
13.
14.
A device that limits the amount of air provided to the front brakes is a:
15.
To test the parking brake, stop the vehicle, put the parking brake on, and:
16.
The most common problem found in roadside inspections is:
17.
Why should you check the brake adjustment often?
18.
Which of the following helps the stop light switch work?
19.
Brake linings should not be _______.
20.
The belt of a belt-driven air compressor should be ________.
21.
On large buses low pressure warning devices usually signal at ______.
22.
What does the air compressor governor control?
23.
Vehicles without automatic air tank drains need to be checked manually to remove ________?
24.
The governor stops the compressor from pumping air at:
25.
What is an alternative name for a brake pedal?