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
Full answers + detailed explanations
Perfect for first-time, renewal applicants
HI CDL Air Brakes Test format:
25 questions
20 correct answers to pass
80% passing score
List of questions
The parking or emergency brake on a heavy vehicle can only be held in position by something that cannot leak away, like:
A driver needs to be able to see a warning when the air pressure in the service air tanks falls below ______.
An application pressure gauge shows how much air you are applying to the brakes. Increased application pressure to maintain the same speed indicates that __________.
When is it OK to leave your truck unattended without applying the parking brakes and choking the wheels?
In case of a low air situation, the spring brakes should come on at:
The ____ shows how much pressure is in the air tanks.
When the safety valve releases air this indicates ___________.
When does the air compressor governor allow air to start pumping?
It is not safe to drive a vehicle that has brake drums with cracks that are longer than _____ of the width of the friction area.
Why is manually adjusting automatic slack adjusters dangerous?
If the spring brakes are on, when should you push the brake pedal?
When checking the air pressure buildup, pressure should build:
The S-cam:
Repeatedly partially increasing and pressing the brake pedal may result in:
When inspecting the air brake system, what particular item in the engine compartment should the driver pay specific attention to?
The brake pedal in an air brake system _______.
Pushing the brake pedal down harder __________.
In a dual air brake system, if the air pressure in one part of the system drops enough to set off the low air warning:
Why do air brakes take longer to stop than hydraulic brakes?
You should use the parking brake _____________.
What is proper braking technique for drivers travelling down a hill or any other downgrade?
Vehicles with ABS have malfunction lamps that are what color?
On a long or steep downgrade, how should vehicle speed be primarily controlled?
To test the parking brake you should _______.
What happens when pressure is put on the air brakes?