Free Nevada CDL Air Brakes Practice Test 2023

Our CDL practice tests:
Based on 2021 NV commercial driver's license manual
Perfect for first-time, renewal applicants
NV CDL Air Brakes Test format:
25 questions
80% passing score
List of questions
1.
The parking or emergency brake on a heavy vehicle can only be held in position by something that cannot leak away, like:
2.
An application pressure gauge shows how much air you are applying to the brakes. Increased application pressure to maintain the same speed indicates that __________.
3.
When is it OK to leave your truck unattended without applying the parking brakes and choking the wheels?
4.
A low pressure warning signal could be __________.
5.
To test the vehicle's service brakes, move the vehicle:
6.
The spring brakes used on the chambers in a straight truck will bring you to a stop when air pressure drops below ___ psi.
7.
8.
9.
Air governor cut-out should be at around:
10.
When parking a vehicle with a modulating control valve ________.
11.
What is the purpose of an antilock braking system (ABS)?
12.
What happens when your brake drums get very hot?
13.
The parking brake knob is usually:
14.
The level at which the air compressor stops pumping air is:
15.
Air braking takes more time than hydraulic braking because:
16.
The parking brake should not be used when wet in freezing temperatures, or:
17.
If air pressure is not built up within the correct amount of time, then:
18.
The trailer air supply knob is usually:
19.
Why should you check the brake adjustment often?
20.
Which of the following helps the stop light switch work?
21.
In tractors and straight trucks spring brakes will come on fully when the air pressure drops to what range?
22.
How often should alcohol containers be checked during cold weather?
23.
What does the air compressor governor control?
24.
A warning to drivers behind you that the air brakes have been applied is the:
25.
To test the parking brake you should _______.