Question 1 of 25
Score: 0/0If your truck or bus has dual parking control valves, it means you can use pressure from a separate tank to:
ExplanationDual parking control valves let you briefly release the spring brakes by using air pressure stored in another tank. This is helpful if you need to move the vehicle a short distance in an emergency.
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Did you know? The static leakage test is a favorite — know the allowable pressure drop cold.
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