USCG USCG Steam
Set 7 • Question #417 of 496
Launch Interactive Practice Room If water hammer develops while opening the valve in a steam line, which of the following actions should be taken?
A
Shut the steam valve at once, open the drain valves until all moisture is drained, shut the drain line valves, and slowly open the steam valve again.
✓ Correct Answer
B
Continue to fully open the steam valve as the drain line valves are opened until all moisture is drained, shut the drain line valves.
C
Stop opening the steam valve, open the drain line valves, resume opening the steam valve slowly, and shut the drain line valves after the steam valve is open fully.
D
Increase the speed of opening the steam valve to rapidly heat the line to stop the water hammer.
USCG NMC Regulatory Explanation
In USCG Steam Plants (Boilers & Turbines), regarding 'If water hammer develops while opening the valve in a steam line, which of the following actions should be taken', the verified engineering fact is: 'Shut the steam valve at once, open the drain valves until all moisture is drained, shut the drain line valves, and slowly open the steam valve again.'.
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