Air Brake System Checks and Procedures

The video tutorial covers a comprehensive three-part air brake check, including testing the spring brakes, service brakes, parking brakes, and trailer brakes. It also involves checking the air system for leaks and ensuring the alarms and dash valves function correctly. The process ensures that all components are working within the specified parameters to maintain vehicle safety.

What is the first part of the three-part air brake check?

• Service brake check

• Parking brake test

• Spring brake test

• Air governor cutout

What should happen when the spring brakes are functioning correctly?

• The vehicle should move forward

• The vehicle should not move

• The alarms should sound

• The dash valves should pop out

During the service brake check, what indicates that the brakes are out of alignment?

• The alarms sound

• The vehicle does not stop

• The dash valves pop out

• The vehicle moves to the left or right

At what speed should you pull ahead during the service brake check?

• 10 miles per hour

• 15 miles per hour

• 5 miles per hour

• 20 miles per hour

What is the maximum operating range for the air pressure?

• 80 to 100 PSI

• 120 to 140 PSI

• 100 to 120 PSI

• 140 to 160 PSI

What should you do first to check the parking brake on the tractor?

• Push the red knob in

• Release the clutch

• Pull the dash valves out

• Push the yellow knob in

What should you do if the air pressure drops below 100 PSI?

• Check the alignment of the wheels

• Release the parking brake

• Increase the idle speed

• Stop the vehicle immediately

What sound indicates that the air governor cutout is functioning?

• A beeping sound

• A purging sound

• A hissing sound

• A clicking sound

How much air pressure should a combination vehicle lose in one minute during the leak test?

• No more than 8 PSI

• No more than 6 PSI

• No more than 4 PSI

• No more than 2 PSI

At what PSI should the alarms activate during the air system test?

• Above 50 PSI

• Above 60 PSI

• Above 55 PSI

• Above 45 PSI