Question

In a vehicle with dual parking control valves, a separate air tank can be used:

Answers

To make the air brakes work more effectively.

To temporarily release the spring brakes.

To charge the brakes on the rear trailer.

Explanation

In a vehicle with dual parking control valves, there is a separate air tank that can be used to temporarily release the spring brakes if they have been activated due to low air pressure. Pushing in the proper control will release the spring brakes for a short period of time, allowing the driver to move the vehicle in an emergency.

This questions appears in the following tests:

Alaska Class B Knowledge Test

Arizona Air Brakes

California Class B Knowledge Test

California Air Brakes

Delaware Air Brakes

Iowa Class A Knowledge Test

Iowa Air Brakes

Louisiana Class B Knowledge Test

North Carolina Class B Knowledge Test

Ohio Class B Knowledge Test

Ohio Air Brakes

Oklahoma Class A Knowledge Test

Oklahoma Air Brakes

Rhode Island Class B Knowledge Test

Rhode Island Double

Utah Air Brakes

Washington Class B Knowledge Test

Washington Air Brakes

Wyoming Class B Knowledge Test