Elevator Mechanic Practice Exam 2025 - Free Elevator Mechanic Practice Questions and Study Guide

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What best describes the operation of a hydro valve, with the elevator at the lobby?

Check valve: Closed; Down valve: Closed; Up valve: Open

A hydro valve operates by regulating the flow of hydraulic fluid to control the movement of an elevator. With the elevator at the lobby, the check valve should be closed to prevent any backflow of fluid. The down valve should also be closed to prevent the elevator from descending, while the up valve should be open to allow fluid to flow and lift the elevator. Option B is incorrect because the check valve and down valve should both be closed, otherwise the elevator could potentially move down. Option C and D are both incorrect because the check valve should be closed, not open.

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Check valve: Closed; Down valve: Open; Up valve: Open

Check valve: Open; Down valve: Closed; Up valve: Open

Check valve: Open; Down valve: Open; Up valve: Open

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