🔍 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.