FURNACE TECHNOLOGY QUIZ

__________ furnace is not an electric furnace.

Resistance

Arc

Pot

Induction

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.

40

60

20

5

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YOUR ANSWER : ?

Which of the following advantages is not associated with the use of preheated air for combustion of a fuel in the furnace?

Increase in flame temperature

Increase in calorific value of the fuel

Saving in fuel consumption

Reduction in scale losses

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YOUR ANSWER : ?

Turndown ratio of a burner gives an idea of the __________ in the furnace.

Minimum heat input rate only

Range of fuel firing rates

Maximum heat input rate only

Volume of the combustion chamber

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YOUR ANSWER : ?

Which of the following is not a recuperative furnace?

Coke oven

Reheating furnace

Steamboiler

Soaking pit

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YOUR ANSWER : ?

In a furnace, the heat taken by the charge/stock and the heat lost to the furnace structure & flue gases depends on the

Thermal conductivity of the charge & structural materials of furnace

Nature of process ; whether batch, continuous or intermittant

All of these

Rate of firing and emissivity of flame

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YOUR ANSWER : ?

Soaking pits are meant for heating steel

Sheets

Ingots

Slabs

Coils

TRUE ANSWER : ?
YOUR ANSWER : ?

Maximum thermal efficiency of boiler may be about __________ percent.

25

10

90

65

TRUE ANSWER : ?
YOUR ANSWER : ?

Hearth furnaces are not used for

Reheating

Melting

None of these

Roasting

TRUE ANSWER : ?
YOUR ANSWER : ?

Size of the combustion chamber of a furnace depends upon the

Preheat temperature of fuel & air

Method of mixing the fuel & air

Heat release rate of the fuel

All of these

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YOUR ANSWER : ?

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