USCG USCG Steam
Set 10 • Question #34 of 496
Launch Interactive Practice Room The purpose of the recirculating line between the turbine driven feed pump and the DC heater is to __________.
A
ensure a steady boiler water level at all loads
B
seal the labyrinth packing on the pump
C
ensure sufficient flow through the feed pump at low load
✓ Correct Answer
D
cool the 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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