CDL Air Brakes Test

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.

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

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

What must vehicles with air brakes have?

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

The compressor is connected to the engine via _____?

Alcohol evaporators in some air brake systems help to:

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

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

Air tanks need to be drained:

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

Select the true statement about emergency brakes:

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

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

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

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

After the initial drop, the maximum leakage rates per minute is:

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

You should___when driving down a long steep hill.

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

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

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

Select the true statement about dual air brake systems.

What does the air compressor governor control?

Spring brakes are usually held back by_____during normal driving.

Select when you should use the parking brake:

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

Water is drained from the compressed air tanks because:

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

How often should air tanks be drained?

You should___to reduce the air leakage rate.

What is the purpose of the supply pressure gauge?

At around____the governor allows the air compressor to start pumping again:

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

The parking brakes should be used____in air brake vehicles.

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

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

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