FURNACE TECHNOLOGY QUIZ

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

Kcal/m³ combustion space

Kcal/hr/m³ combustion space

Kcal/hr

None of these

TRUE ANSWER : ?
YOUR ANSWER : ?

Low stack loss indicates the

Use of sub-stoichiometric air for combustion

Inefficient use of fuel

Oxygen enrichment of combustion air

Efficient use of fuel

TRUE ANSWER : ?
YOUR ANSWER : ?

Regenerators are installed in

Open hearth furnace

Both A & B

Coke ovens

Neither A nor B

TRUE ANSWER : ?
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.

20

60

5

40

TRUE ANSWER : ?
YOUR ANSWER : ?

__________ furnace is not an electric furnace.

Induction

Arc

Pot

Resistance

TRUE ANSWER : ?
YOUR ANSWER : ?

Maximum thermal efficiency of boiler may be about __________ percent.

65

10

25

90

TRUE ANSWER : ?
YOUR ANSWER : ?

Blast furnace stoves are meant for heating

None of these

Air

Steam

Blast furnace gas

TRUE ANSWER : ?
YOUR ANSWER : ?

Dampers are located

Anywhere after the I.D. fan

After the I.D. fan

Near the top of the chimney

Before the I.D fan

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 : ?

Very high pressure boilers are usually __________ boilers.

Fire tube

Water tube

Natural circulation

Waste heat

TRUE ANSWER : ?
YOUR ANSWER : ?

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