FURNACE TECHNOLOGY QUIZ

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

Thoria

Zircon powder

Beryllium

Graphite powder

TRUE ANSWER : ?
YOUR ANSWER : ?

The function of an economiser in a boiler is to preheat the

Pulverised coal

Feedwater

Furnace oil

Combustion air

TRUE ANSWER : ?
YOUR ANSWER : ?

Use of pulverised coal in boilers provides

Less erosion on furnace wall

Better combustion

Smokeless burning

Higher calorific value

TRUE ANSWER : ?
YOUR ANSWER : ?

Ceramic recuperators (made of SiC) is economical, only when used for preheating combustion air above __________ °C.

1000

650

250

850

TRUE ANSWER : ?
YOUR ANSWER : ?

Which furnace employs preheating, heating and soaking zones?

Cupola

Soaking pit

Open hearth furnace

Reheating furnace

TRUE ANSWER : ?
YOUR ANSWER : ?

Reheating furnace (pusher type) is used for heating

Steel coils

Ingots

Steel sheets

Slabs

TRUE ANSWER : ?
YOUR ANSWER : ?

Which of the following is a rotary furnace?

Soaking pit

Annealing furnace

Stoves

Lime kiln

TRUE ANSWER : ?
YOUR ANSWER : ?

Regenerators are normally provided in the

Glass melting furnace

Open hearth furnace

By product coke ovens

All of these

TRUE ANSWER : ?
YOUR ANSWER : ?

Which is not accomplished in an underfired furnace?

Reduction in the temperature of furnace gases

Elimination of cold spot at the bottom of the charge

Increase in heating capacity/m² of floor space

Portection of the periphery of the charge from excessive radiation

TRUE ANSWER : ?
YOUR ANSWER : ?

Regenerators are installed in

Open hearth furnace

Neither A nor B

Coke ovens

Both A & B

TRUE ANSWER : ?
YOUR ANSWER : ?

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