A typical motor-operated valve (MOV) has just been opened from the main control room, and the breaker for the MOV has been opened.
A plant operator has been directed to close the MOV locally for a surveillance test.
If the operator attempts to turn the MOV handwheel in the clockwise direction without first operating the declutch lever, which one of the following will occur?
A. The handwheel will turn, but the valve stem will not move.
B. The handwheel will not turn, and the valve stem will not move.
C. The handwheel will turn, and the valve stem will move toward the closed position because the clutch is automatically engaged when the handwheel is turned.
D. The handwheel will turn, and the valve stem will move toward the closed position because the clutch is automatically engaged when the breaker is opened.
Show Answer
Answer: A
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