USCG USCG Motor
Set 11 • Question #66 of 382
Launch Interactive Practice Room Which of the listed sequence of events occurs when an automatic auxiliary boiler is prepurged?
A
The damper on the inlet side of the furnace is moved to the open position for a given number of seconds and then moved to the closed position.
B
The damper on the inlet side of the furnace is moved to the open position for a given number of seconds and then moved to the low fire position.
✓ Correct Answer
C
The damper is moved to the closed position for a given number of seconds and then moved to the low fire position.
D
The damper in the uptakes is moved to the wide open position for a given number of seconds and then moved to the low firing rate position.
USCG NMC Regulatory Explanation
In USCG Motor Plants (Diesel Engineering), regarding 'Which of the listed sequence of events occurs when an automatic auxiliary boiler is prepurged', the correct operational principle is: 'The damper on the inlet side of the furnace is moved to the open position for a given number of seconds and then moved to the low fire position.'.
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