Furnace Technology

1

An improved and fuel efficient version of the pusher type reheating furnace is the __________ furnace.

A. walking beam

B. shaft

C. tunnel

D. rotary hearth

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2

Recuperator is

A. not used for fuel gas preheating.

B. an intermittant waste heat recovery equipment.

C. a continuous waste heat recovery equipment

D. heavier than regenerator meant for the same duty.

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3

Waste heat from the outgoing flue gases in a thermal power plant is recovered by a/an

A. economiser

B. steam superheater

C. air preheater

D. all (a), (b) and (c)

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4

In which of the following furnaces, the gases are sucked through the stock bed from below?

A. Soaking pit

B. Sintering machine

C. Beehive oven

D. None of these

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5

In a furnace, the heat taken by the charge/stock and the heat lost to the furnace structure & flue gases depends on the

A. rate of firing and emissivity of flame

B. thermal conductivity of the charge & structural materials of furnace.

C. nature of process ; whether batch, continuous or intermittant

D. all (a), (b) and (c)

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