Question 104Steam Plants - QMED

The correct answer is D) maintain a vacuum in the shell of the feed water heater. The connections labeled "A" in the illustration are used to maintain a vacuum in the shell of the feed water heater. This is necessary to improve the efficiency of the heat transfer process and prevent the formation of air pockets that could impede the flow of water through the heater. The other options are incorrect because they do not accurately describe the purpose of the "A" connections. Option A is for the steam air heater drains, option B is for the condensate from the feed water heater, and option C is for the low-pressure bleed steam, none of which are the correct function of the "A" connections shown in the illustration.