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Where is blower installed in induced draught system?

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Where is blower installed in induced draught system?

(a) Near the boiler

(b) Base of the chimney

(c) Above the boiler

(d) Between economizer and air preheater

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Question is from Draught System topic in division Steam Generators & Accessories of Energy Engineering

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The correct answer is (b) Base of the chimney

The explanation is: In induced draught system the blower is installed near the base of the chimney so as to facilitate sucking of flue gas from the furnace. Thus pressure inside the furnace is reduced below atmospheric pressure inducing outside air into the furnace.

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