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What is muffling?(a) Reducing vibration(b) Increasing the flow of gas(c) Reducing noise(d) Filtering the exhaust airI got this question in examination.The doubt is from Lubrication System, Intake and Exhaust Systems topic in section Diesel Engine Plant of Energy Engineering

Answer»

The correct choice is (c) REDUCING noise

Explanation: Muffling is the process of reducing the noise. The EXHAUST system must CARRY approximately 0.23m^3/min-0.30m^3/min of gases per kilowatt developed, at the average exhaust temperature. Muffling of the exhaust noise is DONE by using silencers LOCATED outside building.



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