Exterior Inspections

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Questions and Answers

What is the correct procedure to test the Low Air Warning system in a truck?

Start the truck and pump the brakes until the warning comes on at a specific PSI

Start the truck and ensure the air pressure is above 90 psi, then inform the examiner

Start the truck, pump the brakes until the low air warning comes on at less than 55 PSI, and then inform the examiner

Start the truck, ensure the air pressure is above 90 psi, pump the brakes until the low air warning comes on at a specific PSI, and then inform the examiner (correct)

How do you test the Slow Air Pressure Buildup in a truck?

Pull out the trailer air supply, reduce air pressure to 80 PSI, and then inform the examiner

Pull out the trailer air supply, reduce air pressure to 80 PSI, inform the examiner that the RPMs are between 600 and 900, time the air pressure buildup from 85 to 100 PSI, and then inform the examiner (correct)

Pull out the trailer air supply, reduce air pressure to 80 PSI, time the air pressure buildup from 85 to 100 PSI, and then inform the examiner

Pull out the trailer air supply, reduce air pressure to 80 PSI, inform the examiner that the RPMs are between 600 and 900, and then time the air pressure buildup from 85 to 100 PSI

What is the correct way to test the Tractor Protection System in a truck?

Ensure the trailer air supply button is pulled out, exit the truck, pull out the service line, and get back in the truck

Ensure the trailer air supply button is pulled out, exit the truck, pull out the service line, get back in the truck, and keep the window open and do a full break application for 5 seconds and listen to if air leaks, if it does the truck is defected (correct)

Ensure the trailer air supply button is pulled out and exit the truck

Ensure the trailer air supply button is pulled out, exit the truck, and pull out the service line