USCG USCG Steam
Set 6 • Question #401 of 496
Launch Interactive Practice Room Which of the operating principles listed would apply to a single-element, thermo-hydraulic, feedwater regulator?
A
A failure of the regulator pressure actuating system closes the valve.
✓ Correct Answer
B
The regulator maintains a constant water level throughout the boiler load range.
C
The cooling fins on the generator prevent the formation of steam in the closed system.
D
The pressure in the inner tube acts upon the bellows of the regulator.
USCG NMC Regulatory Explanation
A two-element boiler feedwater regulator responds directly to changes in steam flow and drum water level, anticipating load demand to minimize swell and shrink effects. Option A ('A failure of the regulator pressure actuating system closes the valve.') represents this control response.
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