Question

Push in the trailer air supply control to:

Answers

Activate the emergency brakes.

Deactivate the air brakes.

Sound the horn.

Supply the trailer with air.

Explanation

Push in the trailer air supply control to supply the trailer with air. Pull out the trailer air supply control to turn off the air supply and activate the emergency brakes.

This questions appears in the following tests:

Alabama Combination

Colorado Combination

Nebraska Combination

New Hampshire Combination

New Jersey Combination

New York Combination

North Carolina Combination

Oregon Combination

Pennsylvania Double

Pennsylvania Combination

South Dakota Combination

Texas Double

Wyoming Combination