Question 104Steam Plants - QMED70% to pass
The connections labeled "A" in the illustration, are used to SG-0025
AI Explanation
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.
Related Questions
#102 The main feed check valve functions to _______________.#103 Under EMERGENCY operating conditions, the proper valve positions for controlling feed water to the boiler should be the _______________.#106 Under normal conditions, the rate of heat transfer in a feed water heater is most greatly affected by the _______________.#107 A slight vacuum is maintained in the shell of the first stage heater shown in the illustration. The primary reason for the vacuum is to __ _. Illustration SG-0025 #108 The upper section of the feed water heater indicated by "G" in the illustration is used as the _. Illustration SG-0025