USCG USCG Steam
Set 16 • Question #222 of 496
Launch Interactive Practice Room After a boiler has been taken off the line and is cooling, the air cock is opened to __________.
A
purge all air from the steam drum
B
allow even cooling of the steam drum
C
guard against entrapped gas pockets in the superheater
D
prevent the formation of a vacuum within the boiler
✓ Correct Answer
USCG NMC Regulatory Explanation
In USCG Steam Plants (Boilers & Turbines), regarding 'After a boiler has been taken off the line and is cooling, the air cock is opened to', the verified engineering fact is: 'prevent the formation of a vacuum within the boiler'.
Question Discussion & Notes
0Have a doubt, memory trick, or exam update? Share your insights with fellow mariners.
Loading mariner discussions...