Which of the following procedures would insure proper seating of the valve when closing?

Correct Answer: Option B — closed, opened a half turn, and then closed again

Closing a valve and then opening it a half-turn ensures that any debris trapped between the gate and the seat is flushed away by the flow of liquid. Re-closing the valve then allows for a tighter, more secure seal, preventing leakage and ensuring the valve is fully seated.