Question 95Steam Plants - 1st Asst/Chief

The correct answer is A) cooling water overboard should be about 10°F higher than the inlet temperature. In a single-pass main condenser, the cooling water flows through the condenser tubes in a single pass, absorbing heat from the steam and condensing it into water. The temperature difference between the inlet and outlet of the cooling water is typically around 10°F, which indicates that the condenser is operating efficiently and extracting the maximum amount of heat from the steam. The other options are incorrect because: B) maintaining a vacuum of 29.92" of Hg is not a basic rule for single-pass main condensers, C) the quantity of reheating steam flow is not a factor in the basic operation of a single-pass main condenser, and D) the condensate temperature is not required to be above 104°F as a basic rule.