To verify a manual valve in an operating system is closed, the operator should observe valve position indication and operate the valve handwheel in the…
A. open direction at least one full rotation, then close the valve using normal force.
B. open direction until system flow is observed, then close the valve using normal force.
C. close direction using normal force and verify there is no substantial handwheel movement.
D. close direction using normal force, then operate the valve handwheel an additional one-quarter turn in the close direction.
Show Answer
Answer: C
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