Free New Hampshire CDL Air Brakes Practice Test 2023

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

Our CDL practice tests:
Based on 2021 NH commercial driver's license manual
Full answers + detailed explanations
Perfect for first-time, renewal applicants
NH CDL Air Brakes Test format:
25 questions
20 correct answers to pass
80% passing score
List of questions
If you do not have automatic tank drains, how often should you drain the oil and water from the bottom of compressed air storage tanks?
Air brakes consist of ________.
"A slack adjuster’s free play needs to be adjusted if it is more than about ______ when you pull hard on it."
During normal driving, spring brakes are usually held back by:
The air brake lag distance at 55 mph on dry pavement adds about ____ feet.
On a long or steep downgrade, the foot brakes should be used:
The ____ shows how much pressure is in the air tanks.
Your brakes are fading when:
When the air system is low ________.
Generally, air governor cut-in should be at:
Why is manually adjusting automatic slack adjusters dangerous?
When brakes are applied, the brake shoes will press against the:
Besides heat, another cause of brake fade is:
What tells the driver how much air pressure is in the air tanks?
A device that limits the amount of air provided to the front brakes is a:
The trailer air supply knob is usually:
If your vehicle has an alcohol evaporator, every day during cold weather you should:
In order to make contact with the brake drum, the brake pads and linings are pushed outward by the:
When inspecting the air brake system, what particular item in the engine compartment should the driver pay specific attention to?
In tractors and straight trucks spring brakes will come on fully when the air pressure drops to what range?
Stop light switches are necessary because ________.
On newer vehicles, the parking brake control knob is typically yellow, but on older vehicles, the parking brake might be what color?
What brake system uses part of the service and parking brake systems to stop the vehicle in the event of a brake system failure?
What is the purpose of an air storage tank?
On a long or steep downgrade, how should vehicle speed be primarily controlled?