# 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
Perfect for first-time, renewal applicants
NH CDL Air Brakes Test format:
25 questions
80% passing score
List of questions
1.
A driver needs to be able to see a warning when the air pressure in the service air tanks falls below ______.
2.
All air brake equipped vehicles have:
3.
The most important thing to do when a low air pressure warning comes on is:
4.
Total stopping distance for air brakes is longer than that for hydraulic brakes due to ______ distance.
5.
6.
In most newer vehicles, the parking brake control will be:
7.
When does the air compressor governor allow air to start pumping?
8.
Spring brakes will come on automatically, but the parking brake can also be applied:
9.
The safety valve is set automatically when pressure is:
10.
The parking brake knob is usually:
11.
All of the following are factors in total stopping distance except:
12.
If your truck has a dual air brake system, and one of the systems is low on pressure:
13.
When checking the air pressure buildup, pressure should build:
14.
15.
If air pressure is not built up within the correct amount of time, then:
16.
In case of emergency stops, drivers should:
17.
Compared to hydraulic brakes, air brakes add how much distance to an average 55 mph stop?
18.
Automatic air tanks _______.
19.
If air supply drops when driving, the tractor protection valve ________.
20.
Why should air tanks be drained completely?
21.
How often should alcohol containers be checked during cold weather?
22.
The spring brakes of a tractor will come on when the air pressure falls within _______.
23.
What is a wig wag ?
24.
Vehicles with ABS have malfunction lamps that are what color?
25.
In a dual air brake system, one system will typically control the rear brakes, and the other: