FURNACE TECHNOLOGY QUIZ

Which furnace employs natural draft?

Rotary kilns

L.D. converter

Coke oven

Boiler

TRUE ANSWER : ?
YOUR ANSWER : ?

Which of the following is a periodic furnace?

Rotary kiln

Soaking pit

Tunnel kiln

Reheating furnace

TRUE ANSWER : ?
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Ceramic recuperators compared to metallic recuperators for the same duty

Occupy more space

Are lighter

Are less costly

Have higher pressure differential between flue gas & air side

TRUE ANSWER : ?
YOUR ANSWER : ?

Tunnel kilns are usually used for

Roasting of pyrites

Melting of glass

Drying/tempering of refractories

Reheating of slabs

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Which of the following furnaces will have maximum thermal efficiency?

Boiler furnace

Walking beam reheating furnace

Rotary kilns

Soaking pits

TRUE ANSWER : ?
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Thermal efficiency of an open hearth furnace may be about __________ percent.

20

80

5

50

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Overfire burning in a furnace is a phenomenon characterised by

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

Supply of excess fuel

Supply of excess air

None of these

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YOUR ANSWER : ?

Rate of heat release in a furnace, which is the measure of heat intensity is defined as

Kcal/hr

Kcal/hr/m³ combustion space

None of these

Kcal/m³ combustion space

TRUE ANSWER : ?
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In order to maintain a reducing atmosphere in a furnace, it should have

CO in flue gas

High excess air

No O₂ in flue gas

None of these

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Which of the following is not a continuous waste heat recovery equipment from the flue gases going out of furnace?

Waste heat boiler

Ceramic recuperator

Regenerator

Economiser

TRUE ANSWER : ?
YOUR ANSWER : ?