ENVIRONMENTAL ENGINEERING IN CE QUIZ

Which of the following is not a recuperative furnace?

Reheating furnace

Steamboiler

Soaking pit

Coke oven

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Shaft furnaces are used for

All of these

Roasting

Smelting

Calcining

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Which of the following variables does not affect the furnace capacity?

Ratio of wall surface to surface of stock

Size of the furnace

None of these

Gas velocity in furnace

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Which furnace employs an I.D. fan for the removal of flue gases from the furnace?

Beehive coke oven

Coke oven

High pressure boiler

Blast furnace stoves

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Which of the following is a heat treatment furnace?

Rotary kiln

Reheating furnace

Muffle furnace

Annealing furnace

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Means for giving direction to the circulation of gases in furnaces are

All of these

Arrangement of heating stock in the furnaces

Location of outlet ports and heating & combustion devices

Fans

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Ostwald charts are meant for

Computation of flue gas analysis

Computing the excess/deficiency of combustion air

Calculation of flue gas temperature

None of these

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Overall thermal efficiency of a lumpy coal fired suitably designed heating furnace, if operated & maintained properly may be about __________ percent.

25-30

65-70

45-50

44119

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An example of a periodic furnace is the

Blast furnace

Coke oven heating chamber

Blast furnace stoves

Rotary kilns

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Fuel economy in furnaces can be achieved by

Using oxygen enriched combustion air

Preheating the combustion air

All of these

Reducing the heat loss through furnace openings & doors

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