CDL Air Brakes Test

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

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

Should the air pressure in the service air tanks fall below____the driver must be alerted via warning mechanism in the truck cab.

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

How often should you drain your air tanks?

An example of a low pressure warning signal for air brakes is:

What does the service brake system do?

Select the true statement in regards to the braking power of spring brakes.

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

You should____to check the free play of manual slack adjusters on S-Cam brakes.

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

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

Select the statement that is not part of the air-brake system:

The best way to test if the spring brakes come on automatically is to:

What is the purpose of the supply pressure gauge?

A slack adjuster is:

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

Air tanks should be drained:

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.

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

The parking brakes should be used____in air brake vehicles.

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

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

Water is drained from the compressed air tanks because:

Select when you should use the parking brake:

When should you avoid using the parking brake?

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

Alcohol evaporators in some air brake systems help to:

Select the purpose of fanning air brakes:

Select the true statement in regards to brake drums:

Select which vehicles are required to have a low air pressure warning signal:

How can you check slack adjusters?

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

Select the true statement in regards to an application pressure gauge:

Select the true statement about slack adjusters:

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

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

Where is compressed air stored?

A leak rate for a straight truck or bus air brake system should not exceed _____psi per minute when the engine is off and the brakes are released.

Select how brakes work on long, steep downgrades: