USCG USCG Steam
Set 13 • Question #125 of 496
Launch Interactive Practice Room In a DC heater, which source of steam is commonly used to heat and deaerate condensate?
A
Root steam
B
Auxiliary exhaust steam
✓ Correct Answer
C
Main steam
D
Auxiliary steam
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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