CDL Air Brakes Test

The best way to describe a dual air brake system is:

____is the most common type of foundation brakes used by heavy vehicles.

Select the true statement about slack adjusters:

Select the statement that tells you how you can check the low pressure warning signal.

You should___when driving down a long steep hill.

You should_____when checking the slack adjusters on S-Cam brakes.

You should___to reduce the air leakage rate.

Commerical vehicles typically have this type of brake.

Is this statement true or false: you do not need to use the parking brake if are leaving your vehicle for a short amount of time.

You should_____to make an emergency stop with air brakes when using the stab braking method.

When should you not use the parking brakes?

Where is compressed air stored?

Select the true statement in regards to brake drums:

Select how you would check the truck's slack adjusters.

What keeps air in the tanks should the air compressor develop a leak?

How do you determine if slack adjusters need to be adjusted?

Select the true statement about dual air brake systems:

When does stab braking occur?

Select the true statement in regards to your brake function when your ABS fails

Select the inappropriate way to test for the low pressure warning signal.

When should you drain air tanks that do not have an automatic tank drain?

Select the true statement in regards to brake drums or discs:

Select the purpose of fanning air brakes:

Select the factors that can cause your brakes to fade or fail:

Select how you can tell if your vehicle is equipped with an anti-lock braking system:

The method used to make sure the spring brakes will come on automatically is to:

At what pressure is the safety valve in the air compressor tank set to open?

A slack adjuster is:

Select the true statement about tractor protection valve:

What are spring brakes?

Air tanks should be drained:

How often should air tanks be drained?

The safety valve is usually set to open at:

Select the part that is not a part of the drum brake:

Air pressure should build___with a dual air system.

Select the true statement about dual air brake systems.

What must vehicles with air brakes have?

At what "cut out" level does the governor stop pumping air?

What should you do if the low air pressure warning comes on for only one system in a truck or bus that has a dual air brake system?

Why are you required to take an exam about air brakes?