USCG USCG Steam
Set 11 • Question #69 of 496
Launch Interactive Practice Room In a closed feedwater system, the greatest deaeration of condensate occurs in the __________.
A
DC heater
✓ Correct Answer
B
atmospheric drain tank
C
air ejector condenser
D
vent condenser
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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