CDL Air Brakes Test

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.

How do you know when your brakes are fading?

When should air tanks be drained?

You should brake on a long steep downgrade hill as a supplement to the braking effects of the engine

Select the first action to do when the low air pressure warning comes on:

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

What does the drain valve for air tanks remove?

You should___when driving down a long steep hill.

An air system that is fully charged will typically have ___ psi of pressure.

Water is drained from the compressed air tanks because:

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

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

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

What does it man when the safety valve releases air?

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

How do you test your service brakes?

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

Select how brakes work on long, steep downgrades:

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

Select the answer that is not a part of the braking process when driving a tractor-trailer combination vehicle that has ABS:

Select the true statement about tractor protection valve:

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?

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

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

How often should air tanks be drained?

Air tanks should be drained:

What are slack adjusters?

Select the factor that is known to cause brakes to fail or fade. (more than one answer may be correct, but select only one)

The compressor is connected to the engine via _____?

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

What is the brake system that applies and releases the brakes when the brake pedal is used?

Why do air brakes take longer to stop than hydraulic brakes?

Select the reason as to why air tanks need to be drained:

What does the service brake system do?

Select the true statement about slack adjusters:

What does the air compressor governor control?

Front wheel brakes are good under what kind of conditions?

When should you avoid using the parking brake?

Air pressure should build___with a dual air system.

Select whether the following statement is true or false: Front wheel brakes are good to use in all conditions.