CDL Air Brakes Test

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

Select the true statement in regards to brake drums:

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

What does the drain valve for air tanks remove?

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

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

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

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

When does your vehicle's single brake system need an adjustment?

When should you not use the parking brakes?

When does stab braking occur?

How can you check slack adjusters?

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

What are spring brakes?

How do you check the air compressor governor "cut in" and "cut out" pressures?

How often should you drain your air tanks?

The parking brakes should be used____in air brake vehicles.

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

Select the true statement about tractor protection valve:

You should___when driving down a long steep hill.

Select how brakes work on long, steep downgrades:

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

What does it man when the safety valve releases air?

With the engine cutt off and the brakes released the air loss in a straight truck or bus should not be more than:

Select the true statement about what the Air Compressor Governor controls:

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

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

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.

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

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

The 3 parts of the air brake system are: service brakes, parking brakes, and ____.

You should_____when the low pressure warning is activated:

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

Water is drained from the compressed air tanks because:

Air brake systems should not lose air faster than____when testing for air leakage rates in combination vehicles before applying the brake pedal.

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

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

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?

What is a supply pressure gauge used for?

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