Question 158Steam Plants - Assistant Engineer

The correct answer is C) Lower than normal auxiliary steam temperature. A moderate leak in the desuperheater would cause the auxiliary steam temperature to be lower than normal. The desuperheater is used to control the temperature of the steam, and a leak would allow some of the steam to bypass the desuperheater, resulting in a lower than expected steam temperature. The other options are incorrect because a moderate leak in the desuperheater would not directly affect fuel oil consumption (A or B) or auxiliary steam pressure (D). The leak would primarily impact the steam temperature.