Free New Hampshire CDL Air Brakes Practice Test 2022

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 2022 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
1.
An automatic wig wag will rise out of your view when the pressure in your system rises above what psi?
2.
When inspecting air brakes:
3.
The driver must be able to see a low air pressure warning which comes on before pressure in the service air tanks fall below ____ psi.
4.
When is it OK to leave your truck unattended without applying the parking brakes and choking the wheels?
5.
Emergency stab braking is:
6.
A mechanical device that drops a low air warning into a drivers view is called a:
7.
Excessive heat caused by using your brakes too often can also cause:
8.
Why drain water from compressed air tanks?
9.
Where is the modulating control valve located on some vehicles?
10.
When stab braking if you re-apply the brakes before the wheels start rolling, __________.
11.
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.
12.
What happens when your brake drums get very hot?
13.
Air braking takes more time than hydraulic braking because:
14.
The manual adjustment of automatic slack adjusters is:
15.
Average stopping distance under normal conditions at 55 mph is:
16.
The S-cam:
17.
Controlled braking is only possible _________.
18.
When driving an older vehicle that has a manual front brake limiting valve, drivers should:
19.
The braking power of the spring brakes ______.
20.
If your vehicle has an alcohol evaporator, the evaporator's purpose is to _____.
21.
You should use the parking brake _____________.
22.
Spring brakes are applied:
23.
What is the purpose of a supply pressure gauge?
24.
To avoid damaging the brakes, what should you never do while the spring brakes are applied?
25.
Water and oil _______.