USCG USCG Steam
Set 3 • Question #293 of 496
Launch Interactive Practice Room Which of the pumps listed operates at constant speed and delivers water to the deaerating feed tank at a nearly constant pressure?
A
Main feed booster pump
B
Main feed pump
C
Main condensate pump
✓ Correct Answer
D
Main circulating pump
USCG NMC Regulatory Explanation
The Deaerating Feed Tank (DFT / DC Heater) scrubs dissolved oxygen and non-condensable gases from boiler feedwater using direct contact steam heating, preventing localized oxygen pitting corrosion in economizers and steam drums.
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