To verify that a manual valve in a pressurized water system is closed, the operator should observe valve position indication and operate the valve handwheel in the…
A. close direction using normal force, and verify there is no substantial handwheel movement.
B. close direction using normal force, then turn the handwheel an additional one-half turn using additional force if necessary.
C. open direction until flow sounds are heard, then close the valve using normal force until the handwheel stops moving.
D. open direction until the valve stem moves, then close the valve using normal force until the handwheel stops moving.
Show Answer
Answer: A
Share your understanding of this question with the correct explanation.