FURNACE TECHNOLOGY QUIZ

An example of a periodic furnace is the

Blast furnace

Blast furnace stoves

Coke oven heating chamber

Rotary kilns

TRUE ANSWER : ?
YOUR ANSWER : ?

Which of the following is the most important deterrants to an extended use of pulverised coal in boiler firing?

Higher power consumption in its transportation

Excessive fly ash discharge from the stack

Ash disposal problem

Erosion of induced draft fan blades

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YOUR ANSWER : ?

Thermal efficiency of furnaces can be improved by

Minimising heat losses from furnace walls

All of these

Waste heat recovery from flue gas

Maintaining proper draught

TRUE ANSWER : ?
YOUR ANSWER : ?

Heat balance of furnace provides means of determining the

Thermal efficiency of the process

All of these

Sources of heat losses

Scope of reduction of heat losses

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YOUR ANSWER : ?

Combustion of furnace oil in a furnace (soaking pit) with preheated combustion air at 400°C results in saving of about __________ percent furnace oil as compared to its combustion with atmospheric air, if the flue gas outlet temperature from the soaking pit is 1200°C.

5

60

20

40

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YOUR ANSWER : ?

Operation of blast furnace stove is based on the principles of a __________ furnace.

Regenerative

Neither A nor B

Both A and B

Recuperative

TRUE ANSWER : ?
YOUR ANSWER : ?

Regenerators are used for waste heat recovery in

Beehive coke oven

By-product coke ovens

Soaking pits

Blast furnace stoves

TRUE ANSWER : ?
YOUR ANSWER : ?

Decarburisation of steel

Is favoured by CO₂

Is the removal of carbon from iron carbide (Fe₃C)

All of these

Affects its crystalline structure

TRUE ANSWER : ?
YOUR ANSWER : ?

Soaking pits are meant for heating steel

Coils

Slabs

Ingots

Sheets

TRUE ANSWER : ?
YOUR ANSWER : ?

The heating capacity of continuous reheating furnace depends upon the

Ratio of wall surface to stock surface

Hearth area and furnace temperature

All of these

Emissivity of the stock

TRUE ANSWER : ?
YOUR ANSWER : ?

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