FURNACE TECHNOLOGY QUIZ

Which of the following is not a recuperative furnace?

Soaking pit

Reheating furnace

Steamboiler

Coke oven

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.

5

40

60

20

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

High CO/CO₂

H₂

All of these

CO

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YOUR ANSWER : ?

In salt bath furnace, heat is transferred to the charge mainly by

None of these

Convection

Conduction

Radiation

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YOUR ANSWER : ?

Furnace aerodynamics is related to the __________ in the furnace.

Movement of gases

Measurement of flue gas volume

Temperature control

Pressure adjustment

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YOUR ANSWER : ?

Which furnace employs an I.D. fan for the removal of flue gases from the furnace?

Coke oven

High pressure boiler

Blast furnace stoves

Beehive coke oven

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YOUR ANSWER : ?

Thermal efficiency of furnaces can be improved by

Waste heat recovery from flue gas

Maintaining proper draught

Minimising heat losses from furnace walls

All of these

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YOUR ANSWER : ?

The thermal efficiency of an air/fuel gas preheating recuperator may be as high as __________ percent.

50

85

99

65

TRUE ANSWER : ?
YOUR ANSWER : ?

Shaft furnaces are used for

Calcining

All of these

Roasting

Smelting

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YOUR ANSWER : ?

The reason for excessive clinker formation in gas producers is the

Use of coal/coke containing a high % of fines and ash

All of these

Development of hot spots in the fuel bed and an abnormally high rate of gasification

Use of fuel having too low an ash fusion temperature

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YOUR ANSWER : ?