USCG USCG Steam
Set 3 • Question #289 of 496
Launch Interactive Practice Room Which of the components listed prevents water from flowing back into the auxiliary exhaust line if the deaerating feed tank becomes flooded?
A
Exhaust piping
B
Pumps
C
Check valve
✓ Correct Answer
D
Reverse-acting relief valve
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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