Air Brake Test Basic 2

Question 1

In an air brake system, what component stores the compressed air for use by the brakes?

Accepted Answer

Air reservoir tanks

Answer

Air reservoir tanks hold the compressed air that operates the brakes.

Question 2

What does the air compressor governor control?

Accepted Answer

When the compressor pumps air into the reservoirs

Answer

The governor controls when the compressor cuts in and out to maintain reservoir pressure.

Question 3

At what pressure does the low air pressure warning typically activate?

Accepted Answer

Below 60 psi

Answer

The low air pressure warning must activate before pressure drops below 60 psi.

Question 4

What is the purpose of draining the air tanks daily?

Accepted Answer

To remove water and oil that collect in the tanks

Answer

Draining removes accumulated water and compressor oil that can damage the system.

Question 5

What device automatically expels moisture and removes oil from the air system?

Accepted Answer

Air dryer

Answer

The air dryer collects and removes moisture and oil before air enters the reservoirs.

Air Brake Practice Test