CDL Air Brakes Test

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

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

What are spring brakes?

What does the service brake system do?

Air pressure loss in a vehicle with a fully charged air system should be less than_______after the initial drop and brake applied.

What does it man when the safety valve releases air?

What does the drain valve for air tanks remove?

When does stab braking occur?

Select the true statement about dual air brake systems.

Select the true statement about dual air brake systems:

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

The compressor is connected to the engine via _____?

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

How do you test your service brakes?

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

Select what you should do before leaving the vehicle unattended:

Front wheel brakes are good under what kind of conditions?

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

Air pressure should build___with a dual air system.

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

Select the purpose of fanning air brakes:

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

When should air tanks be drained?

How often should you drain your air tanks?

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

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

What is the purpose of the supply pressure gauge?

You should___to reduce the air leakage rate.

Select how brakes work on long, steep downgrades:

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

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

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

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.

You should___when driving down a long steep hill.

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

You should be in the proper gear before going down a hill because:

The best way to test the low air pressure warning signal is to:

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

What does the air compressor governor control?

Select the true statement in regards to brake drums: