Free Ohio CDL Air Brakes Practice Test 2023

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

Our CDL practice tests:
Based on 2021 OH commercial driver's license manual
Full answers + detailed explanations
Perfect for first-time, renewal applicants
OH CDL Air Brakes Test format:
25 questions
20 correct answers to pass
80% passing score
List of questions
When inspecting air brakes:
Modern air brakes combine three different systems. They are the service, the parking, and the _____ brakes.
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.
The spring brakes used on the chambers in a straight truck will bring you to a stop when air pressure drops below ___ psi.
The ____ shows how much pressure is in the air tanks.
Spring brakes will generally come on at:
The main factor in causing brake fade is:
In ideal conditions a truck or bus with air brakes going at 55 mph would require the stopping distance of how many feet?
When the air system is low ________.
Another name for the brake pedal is the "foot valve", or:
What is the purpose of an antilock braking system (ABS)?
When your brake's main air pressure is lost ________.
Spring brakes will come on automatically, but the parking brake can also be applied:
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.
The parking brake knob is usually:
Total stopping distance with air brakes is Perception distance + Braking Distance + Brake Lag Distance +:
Repeatedly partially increasing and pressing the brake pedal may result in:
The brake pedal in an air brake system _______.
Pushing the brake pedal down harder __________.
When driving an older vehicle that has a manual front brake limiting valve, drivers should:
How does the antilock brake system benefit the driver?
What is proper braking technique for drivers travelling down a hill or any other downgrade?
The governor stops the compressor from pumping air at:
Vehicles with ABS have malfunction lamps that are what color?
The warning light and buzzer will come on when the air pressure in either system drops below what psi?