FURNACE TECHNOLOGY QUIZ

__________ is an indirectly heated furnace.

Muffle furnace

Soaking pit

Open hearth furnace

Reheating furnace

TRUE ANSWER : ?
YOUR ANSWER : ?

Which of the following accentuates clinker-ing troubles on furnace grate burning coal?

Thick firebed and preheated primary air

Low forced draft & fuel bed temperature

Low reactivity of carbonised residue containing high proportion of iron & sulphur

All of these

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YOUR ANSWER : ?

Which is a continuous furnace?

None of these

Annealing furnace

Glass tank furnace

Coke ovens

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Scaling of furnace stock is reduced by __________ in flue gas.

H₂

High CO/CO₂

CO

All of these

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YOUR ANSWER : ?

In which of the following furnaces, the gases are sucked through the stock bed from below?

Beehive oven

Sintering machine

Soaking pit

None of these

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YOUR ANSWER : ?

Which of the following is not a directly fired furnace?

By-product coke oven

Sintering furnace

Open hearth furnace

Calcination kiln

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The main function of a muffle in the muffle furnace is to

Protect the charge from the effects of the products of combustion

Both A & B

Neither A nor B

Smooth out temperature inequalities on the combustion side of the muffle wall

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YOUR ANSWER : ?

Thermal efficiency of blast furnace stoves used for heating blast (air) may be about __________ percent.

60

40

20

80

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Reverberatory furnace is used for

Roasting/reduction of ores

Steel melting

Annealing steel coil

Heating air

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Recuperator is

Not used for fuel gas preheating

A continuous waste heat recovery equipment

An intermittant waste heat recovery equipment

Heavier than regenerator meant for the same duty

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