# 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.
In case of emergency when driving a vehicle equipped with dual parking control valves, you should:
2.
"A slack adjuster’s free play needs to be adjusted if it is more than about ______ when you pull hard on it."
3.
Excessive use of the service brakes results in overheating which can lead to:
4.
At 55 mph on dry pavement, the air brake lag distance is how many feet?
5.
The supply pressure gauge shows how much pressure:
6.
To make sure that the spring brakes come on automatically, do all of the following except:
7.
In most newer vehicles, the parking brake control will be:
8.
When stab braking if you re-apply the brakes before the wheels start rolling, __________.
9.
Some vehicles are equipped with a control allowing you to apply the spring brakes gradually, called a:
10.
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.
11.
The safety valve is set automatically when pressure is:
12.
If your truck has a dual air brake system, and one of the systems is low on pressure:
13.
Which of these is NOT a proper time to apply the parking brakes?
14.
In order to make contact with the brake drum, the brake pads and linings are pushed outward by the:
15.
The brake pedal in an air brake system _______.
16.
You should avoid using the parking brake when _______.
17.
The service brake system ________.
18.
On newer vehicles what color is the parking brake knob?
19.
Brake drums should not have cracks longer than what length?
20.
The air compressor is connected to the engine through ______.
21.
If air supply drops when driving, the tractor protection valve ________.
22.
What is proper braking technique for drivers travelling down a hill or any other downgrade?
23.
Vehicles without automatic air tank drains need to be checked manually to remove ________?
24.
Typically, at what psi does the air compressor governor stop the compressor from pumping air?
25.
The governor stops the compressor from pumping air at: