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.

Furnace Technology
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.

60

5

40

20

60

5

40

20

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Furnace Technology
In a furnace employing forced draught as compared to induced draught,

The fan operates hot and hence blades are liable to corrosion and erosion

None of these

Positive pressure exists in the furnace

Air is sucked in, so air leaks are more and hence the furnace efficiency is reduced

The fan operates hot and hence blades are liable to corrosion and erosion

None of these

Positive pressure exists in the furnace

Air is sucked in, so air leaks are more and hence the furnace efficiency is reduced

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Furnace Technology
Soaking pits are meant for heating steel

Slabs

Ingots

Coils

Sheets

Slabs

Ingots

Coils

Sheets

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Furnace Technology
Which is a regenerative furnace?

Both A and B

Open hearth furnace

Coke oven heating chamber

Neither A nor B

Both A and B

Open hearth furnace

Coke oven heating chamber

Neither A nor B

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Furnace Technology
While the fuel fired furnace can be used upto a maximum temperature of about 1700°C, the electric furnace can be used upto a temperature of about __________ °C.

6000

4500

3000

2000

6000

4500

3000

2000

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Furnace Technology
Overall thermal efficiency of a lumpy coal fired suitably designed heating furnace, if operated & maintained properly may be about __________ percent.

65-70

45-50

44119

25-30

65-70

45-50

44119

25-30

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Furnace Technology

Furnace Technology 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.

Furnace Technology In a furnace employing forced draught as compared to induced draught,

Furnace Technology Soaking pits are meant for heating steel

Furnace Technology Which is a regenerative furnace?

Furnace Technology While the fuel fired furnace can be used upto a maximum temperature of about 1700°C, the electric furnace can be used upto a temperature of about __________ °C.

Furnace Technology Overall thermal efficiency of a lumpy coal fired suitably designed heating furnace, if operated & maintained properly may be about __________ percent.

Furnace Technology
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.

Furnace Technology
In a furnace employing forced draught as compared to induced draught,

Furnace Technology
Soaking pits are meant for heating steel

Furnace Technology
Which is a regenerative furnace?

Furnace Technology
While the fuel fired furnace can be used upto a maximum temperature of about 1700°C, the electric furnace can be used upto a temperature of about __________ °C.

Furnace Technology
Overall thermal efficiency of a lumpy coal fired suitably designed heating furnace, if operated & maintained properly may be about __________ percent.