Question 165Steam Plants - QMED

The correct answer is D) all of the above. The DC heater functions to remove air from the feed water, heat the feed water, and store the feed water. This is necessary to ensure a consistent supply of hot water for the boiler system on a vessel. Removing air from the feed water prevents issues like corrosion and scale buildup, heating the water prepares it for use in the boiler, and storing the water provides a reserve supply. The DC heater is an integral component of the boiler feed water system and performs all of these critical functions. The other answer choices are incorrect because they only describe one of the three primary functions of the DC heater, rather than the full scope of its responsibilities in the overall boiler system.