Answer :
To test the tractor protection valve, the driver must check for air exhausting from the: Option 2: trailer supply line with the trailer air supply valve closed (pulled out).
What is the tractor protection valve
To test the tractor protection valve, the driver must first close the trailer supply valve. This will prevent air from flowing from the tractor to the trailer. The driver then disconnects the trailer service line from the tractor. If air is exhausting from the trailer service line, then the tractor protection valve is defective.
When the trailer air supply valve is closed (pulled out), air should exhaust from the trailer supply line to test the tractor protection valve. This test ensures that the tractor protection valve functions correctly by allowing air to escape when there is a potential issue with the trailer's air supply, such as a break in the air line or a disconnection.
Learn more about tractor protection valve from
https://brainly.com/question/31659755
#SPJ4
