FURNACE TECHNOLOGY QUIZ

In order to maintain a reducing atmosphere in a furnace, it should have

High excess air

No O₂ in flue gas

CO in flue gas

None of these

TRUE ANSWER : ?
YOUR ANSWER : ?

Size of the combustion chamber of a furnace depends upon the

Preheat temperature of fuel & air

All of these

Method of mixing the fuel & air

Heat release rate of the fuel

TRUE ANSWER : ?
YOUR ANSWER : ?

The heating capacity of continuous reheating furnace depends upon the

Hearth area and furnace temperature

Ratio of wall surface to stock surface

All of these

Emissivity of the stock

TRUE ANSWER : ?
YOUR ANSWER : ?

Oxygen enrichment of combustion air does not result in increase of the

Stack loss

Flame temperature

Oxygen in the flue gas

Heat transfer rate in the furnace

TRUE ANSWER : ?
YOUR ANSWER : ?

Regenerators compared to the recuperators for the same duty

Are less costly

Occupy more space

Are of smaller size

All of these

TRUE ANSWER : ?
YOUR ANSWER : ?

Waste heat from the outgoing flue gases in a thermal power plant is recovered by a/an

All of these

Steam superheater

Air preheater

Economiser

TRUE ANSWER : ?
YOUR ANSWER : ?

In reverberatory furnace, charge is heated mainly by

Radiation of heat from the roof of the combustion chamber

Natural convection

None of these

Conduction

TRUE ANSWER : ?
YOUR ANSWER : ?

Reverberatory furnace is used for

Steel melting

Roasting/reduction of ores

Heating air

Annealing steel coil

TRUE ANSWER : ?
YOUR ANSWER : ?

The electric furnace in which heat is produced by a combination of induced current and skin effect is called __________ furnace.

Resistance

Low frequency induction

Arc

High frequency induction

TRUE ANSWER : ?
YOUR ANSWER : ?

Rotary kilns are used in the

Cement manufacture

Neither A nor B

Both A and B

Calcination of limestone & dolomite

TRUE ANSWER : ?
YOUR ANSWER : ?

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