Question 46General Subjects - QMED

The correct answer is D) The exhaust temperature is controlled by regulating the admission of relatively cool ambient air into the exhaust stream. This is the correct answer because the addition of cool ambient air into the exhaust stream is a common method for controlling the temperature of the exhaust from a solid waste/sludge incinerator. The cool air helps to lower the overall temperature of the exhaust, preventing it from exceeding critical levels. The other options are incorrect because they do not directly address the issue of exhaust temperature control. Regulating the admission of combustion air (A) or auxiliary fuel (B) would affect the combustion process, but not necessarily the exhaust temperature. Controlling the exhaust gas flow (C) would not directly cool the exhaust stream.