FURNACE TECHNOLOGY QUIZ

Large tonnage of refractory bricks are dried in a

Rotary hearth furnace

Tunnel kiln

Shaft furnace

Muffle furnace

TRUE ANSWER : ?
YOUR ANSWER : ?

Ceramic coating material for furnace refractory, which increases its emissivity and thus the radiation heat transfer rate in the furnace, comprises of

Beryllium

Zircon powder

Thoria

Graphite powder

TRUE ANSWER : ?
YOUR ANSWER : ?

Maximum heat transfer in high temperature furnaces is by

Either A, B or C; depends on the type of furnace

Convection

Conduction

Radiation

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Fuel used in B.F. stove is

Furnace oil

Blast furnace gas/mixed gas

Coke oven gas

Pulverised coal

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

44119

65-70

25-30

45-50

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YOUR ANSWER : ?

Which is a continuous furnace?

Annealing furnace

None of these

Coke ovens

Glass tank furnace

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YOUR ANSWER : ?

Overfire burning in a furnace is a phenomenon characterised by

None of these

Supply of excess air

Burning carbon monoxide and other incombustible in upper zone of furnace by supplying more air

Supply of excess fuel

TRUE ANSWER : ?
YOUR ANSWER : ?

Higher furnace temperature can not be achieved by use of a lean fuel gas in the furnace by

Preheating the fuel gas

Oxygen enrichment of combustion air

Preheating the combustion air

Increasing the draft in the furnace

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Shaft furnaces are used for

Calcining

All of these

Roasting

Smelting

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Acid dew point temperature (ADT) of a flue gas produced by the combustion of a fuel containing 1% sulphur may be about __________ °C.

130

250

180

80

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YOUR ANSWER : ?

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