Question

A device in which some portion of waste heat of flue gases is recovered to heat the air before it passes to the furnace for combustion purpose is known as __________

a.

air preheater

b.

superheater

c.

injector

d.

none of the mentioned

Answer: (a).air preheater

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Q. A device in which some portion of waste heat of flue gases is recovered to heat the air before it passes to the furnace for combustion purpose is known as __________

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