Question 93Steam Plants - 1st Asst/Chief

The correct answer is C) 4 degrees Fahrenheit. The condensate depression is the difference between the condensate discharge temperature and the saturation temperature corresponding to the main condenser vacuum. With a vacuum of 28.5"Hg, the saturation temperature is approximately 86°F. Since the condensate discharge temperature is also 86°F, the condensate depression is 4 degrees Fahrenheit. The other options are incorrect because: A) 0.2 inches Hg is the incorrect unit for condensate depression, which is a temperature difference. B) 0.7 inches Hg is also the incorrect unit for condensate depression. D) 7 degrees Fahrenheit is an incorrect temperature difference based on the given information.