Technician A says that the relay section of a dual circuit foot valve is actuated mechanically under normal operation.Technician B says that the primary piston of a foot valve is actuated mechanically under normal operation.Who is correct?

Question

Quizplus · Accepted Answer

Technician B is correct because the primary piston of a foot valve is indeed actuated mechanically under normal operation, typically by the depression of the brake pedal. Technician A's statement is incorrect because the relay section of a dual circuit foot valve is not actuated mechanically under normal operation; it is designed to control air flow to the brake chambers.

Technician a Says That the Relay Section of a Dual