1 . What helps prevent wheel lockup when braking?

An Anti-Lock Braking System (ABS)
Air brakes
An alternator
Click Here
Full Cheat Sheet

2 . Lights that indicate that anti-lock brakes are not working are:

Gray.
Blue.
Yellow.
Take a FREE Practice Test Now

3 . In a vehicle with dual air brakes, a leak in one system ____ the second system.

Will always affect
May not affect
Is caused by
Take a FREE Practice Test Now

4 . In a dual air brake system:

Air tanks are shared between both systems.
Each system has its own air tanks.
You must designate which system you are using.
Take a FREE Practice Test Now

5 . What is brake lag?

The time required for the brakes to work after the brake pedal is pressed
The distance between the brake pedal and the floor
The amount of air pressure used to stop the vehicle
Click Here
Full Cheat Sheet

6 . If the safety relief valve in an air brake system is releasing air:

You should not be concerned as this is a normal process.
There is something wrong with the brakes.
The valve is operational.
Take a FREE Practice Test Now

7 . Truck tractors with air brakes built on or after March 1, 1997 must have:

An Anti-Lock Braking System (ABS).
Bluetooth.
A GPS.
Take a FREE Practice Test Now

8 . Brakes out of adjustment will:

Work properly.
Cause some of the brakes to overwork and malfunction.
Allow better acceleration.
Take a FREE Practice Test Now

9 . When you are about to start down a hill, you should switch into a ____ gear.

Higher
Faster
Lower
Click Here
Full Cheat Sheet

10 . A wig wag is:

A low pressure warning device.
A tube that carries air to the brakes.
A type of air brake system.
Take a FREE Practice Test Now

11 . Why do large vehicles use air brakes?

Other brake systems squeak too loudly.
Air brakes are very effective systems.
Other braking systems are hard to come by.
Take a FREE Practice Test Now

12 . Why should you regularly drain the air tanks?

Because the air gets old and needs to be replaced
Because compressed air contains some water and the water collects in the tanks
To allow for a change in pressure
Take a FREE Practice Test Now

13 . When parked on a flat surface, you should:

Use wheel chocks to prevent your vehicle from moving.
Not use wheel chocks.
Use wheel chocks, but only if you have applied the parking brake.
Click Here
Full Cheat Sheet
Study tip:

Reduce your study time from hours to minutes with a DMV exam “Cheat Sheet”

99.2% of people who use the cheat sheet pass the FIRST TIME

Click Here
Full Cheat Sheet

14 . Brakes can get out of adjustment quickly, especially:

If they are hot.
In the winter time.
If they are used frequently.
Take a FREE Practice Test Now

15 . During an applied leakage test, the maximum leakage rate for a double combination vehicle is ____ in a minute.

2 psi
4 psi
6 psi
Take a FREE Practice Test Now

16 . During an applied leakage test, the maximum leakage rate for a triple combination vehicle is ____ in a minute.

2 psi
4 psi
6 psi
Take a FREE Practice Test Now

17 . The leakage rate for a triple combination vehicle with air brakes should be no more than ____ in one minute during a static leakage test.

8 psi
5 psi
3 psi
Click Here
Full Cheat Sheet

18 . ____ make up the emergency brake system.

Only parts of the parking brake system
Only parts of the service brake system
Parts of the parking and service brake systems
Take a FREE Practice Test Now

19 . If air pressure drops to a level between ____, a visual low pressure warning signal should have already activated.

55 and 75 psi.
80 and 95 psi.
65 and 100 psi.
Take a FREE Practice Test Now

20 . A low air pressure warning signal should activate:

When tank pressure falls below 120 psi.
When tank pressure falls below 60 psi.
When tank pressure falls below 10 psi.
Take a FREE Practice Test Now

21 . A safety valve is set to open at ____ pounds per square inch (psi).

100
150
200
Click Here
Full Cheat Sheet

22 . Which of the following is not part of a vehicle’s air brake system?

Air gauges
Low pressure warning device
Air filter
Take a FREE Practice Test Now

23 . Air pressure should build up in a single air system within:

15 minutes.
12 minutes.
Three minutes.
Take a FREE Practice Test Now

24 . When traveling down a steep downgrade:

The air brakes should be used.
The vehicle should be placed in a low gear and the driver should use engine braking.
The driver should continually downshift instead of using the brakes.
Take a FREE Practice Test Now

25 . Once the air tanks are at an air pressure level of 125 psi, the air compressor governor will:

Stop the compressor from pumping air.
Release air from the tanks.
Begin pumping air into the tanks.
Click Here
Full Cheat Sheet