Which valve is operated by a handle and screw mechanism to move a solid plate into or out of the waterway?

Which valve is operated by a handle and screw mechanism to move a solid plate into or out of the waterway?

• A. Butterfly Valve
• B. Pitot Tube
• C. Gate Valve
• D. Residual Pressure

Answer: (C)

The mechanism described is a gate valve. A gate valve uses a solid gate (plate) that moves straight into or out of the waterway to block or allow flow. It is operated by a threaded stem connected to a handle or wheel; turning the handle advances or retracts the stem, raising or lowering the gate so it slides into the seating surfaces to shut off flow or clears them to reopen. This provides a true, full shutoff when needed. By contrast, a butterfly valve relies on a rotating disc to obstruct flow, not a solid plate moving linearly; a pitot tube is a measurement device for fluid velocity, and residual pressure isn’t a valve type.

The mechanism described is a gate valve. A gate valve uses a solid gate (plate) that moves straight into or out of the waterway to block or allow flow. It is operated by a threaded stem connected to a handle or wheel; turning the handle advances or retracts the stem, raising or lowering the gate so it slides into the seating surfaces to shut off flow or clears them to reopen. This provides a true, full shutoff when needed. By contrast, a butterfly valve relies on a rotating disc to obstruct flow, not a solid plate moving linearly; a pitot tube is a measurement device for fluid velocity, and residual pressure isn’t a valve type.