To "verify" the position of a fully opened...

Question 1 / 270705eccef9bbacbc34ba4d453a6

Question 1 of 270705eccef9bbacbc34ba4d453a6

To "verify" the position of a fully opened manual valve in an operating system, the operator should operate the valve hand wheel:

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Question 1 of 27070

To "verify" the position of a fully opened manual valve in an operating system, the operator should operate the valve hand wheel:

🔍 Key Concepts

• Backseating of valves and what it means when a valve is fully opened • Purpose of "verifying" vs. changing a valve’s position in an operating system • Potential risks of running a valve all the way closed and open again while the system is in operation

💭 Think About

• Ask yourself: when you just want to confirm that a valve is fully open, should you significantly change the flow in the line, or only minimally disturb it? • Think about what happens to the stem and packing when you move a valve from fully open toward closed and then return it—what small movement confirms it is on the backseat? • Which choices involve moving the valve through a large range of motion that could affect system pressure or flow, and which involve only a small movement to check backseating?

✅ Before You Answer

• Identify which option uses minimal movement from the supposed fully open position to confirm the valve is on its backseat. • Eliminate any option that requires fully closing a valve in an operating system just to verify its position. • Focus on the answer that checks for backseating without unnecessarily cycling the valve through its entire travel.

Question 1 of 27070

To "verify" the position of a fully opened manual valve in an operating system, the operator should operate the valve hand wheel:

in the open direction until the valve is back seated one-half turn

to fully close the valve, then open the valve to the fully open position.

in the closed direction, then open the valve to its previously open position.

to open the valve until it touches the backseat, then close the valve to the desired position.

Question 1 / 270705eccef9bbacbc34ba4d453a6

Question 1 of 270705eccef9bbacbc34ba4d453a6

To "verify" the position of a fully opened manual valve in an operating system, the operator should operate the valve hand wheel:

Back

Question 1 of 27070

To "verify" the position of a fully opened manual valve in an operating system, the operator should operate the valve hand wheel: