USCG USCG Steam
Set 7 • Question #425 of 496
Launch Interactive Practice Room When seated, the disc of a safety valve has an area of 0.75 square inches (1.9 sq cm). When the valve lifts the area is increased by 10%. If the valve lifts at 300 psig (2170 kPa), at approximately what pressure will the valve reseat?
A
262 psig (1907 kPa)
B
273 psig (1983 kPa)
✓ Correct Answer
C
284 psig (2059 kPa)
D
295 psig (2135 kPa)
USCG NMC Regulatory Explanation
In USCG Steam Plants (Boilers & Turbines), regarding 'When seated, the disc of a safety valve has an area of 0.75 square inches (1.9 sq cm). When the valve lifts the area is increased by 10%. If the valve lifts at 300 psig (2170 kPa), at approximately what pressure will the valve reseat', the verified engineering fact is: '273 psig (1983 kPa)'.
Question Discussion & Notes
0Have a doubt, memory trick, or exam update? Share your insights with fellow mariners.
Loading mariner discussions...