FURNACE TECHNOLOGY QUIZ

__________ is an indirectly heated furnace.

Reheating furnace

Open hearth furnace

Soaking pit

Muffle furnace

TRUE ANSWER : ?
YOUR ANSWER : ?

Which of the following is a rotary furnace?

Annealing furnace

Stoves

Soaking pit

Lime kiln

TRUE ANSWER : ?
YOUR ANSWER : ?

Metallic recuperators are not used for waste heat recovery, if the hot flue gas temperature is above __________ °C, because corrosion prevails at higher temperatures.

1250

1050

750

350

TRUE ANSWER : ?
YOUR ANSWER : ?

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

65-70

44119

45-50

25-30

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Decarburisation of steel

Is the removal of carbon from iron carbide (Fe₃C)

Affects its crystalline structure

All of these

Is favoured by CO₂

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In producer gas making furnace, steam is added along with air to mainly control the

Fusion of coal ash & clinker formation

Temperature of producer gas

Tar content in producer gas

V. of producer gas

TRUE ANSWER : ?
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Neutral atmosphere is maintained in a/an __________ furnace.

Open hearth

Cold rolled steel coil annealing

Soaking pit

Walking beam reheating

TRUE ANSWER : ?
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Turndown ratio of a burner gives an idea of the __________ in the furnace.

Maximum heat input rate only

Range of fuel firing rates

Volume of the combustion chamber

Minimum heat input rate only

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

Beehive coke oven

High pressure boiler

Coke oven

Blast furnace stoves

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

Zircon powder

Graphite powder

Thoria

Beryllium

TRUE ANSWER : ?
YOUR ANSWER : ?

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