USCG USCG Steam
Set 15 • Question #206 of 496
Launch Interactive Practice Room With the steam control valve wide open during normal operation, the rate of steam flow from the auxiliary exhaust steam line to the DC heater is actually a function of __________.
A
rate of condensation in the DC heater
✓ Correct Answer
B
spring pressure of the spray valves
C
water level in the DC heater reservoir
D
rate of evaporation in the DC heater
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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