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.

20

5

40

60

20

5

40

60

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Furnace Technology
In which of the waste heat recovery equipment, the flow of flue gas and air is alternately reversed after a fixed interval of time?

Recuperator

Waste heat boiler

Regenerator

None of these

Recuperator

Waste heat boiler

Regenerator

None of these

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Furnace Technology
The amount of combustible escaping uncon-sumed from the furnace, depends upon the

Air preheat and the flow of gases in the furnace (mixing by induction, by acceleration or by change of direction)

Burner design (thoroughness of mixing versus stratification)

All of these

Air supplied and furnace temperature

Air preheat and the flow of gases in the furnace (mixing by induction, by acceleration or by change of direction)

Burner design (thoroughness of mixing versus stratification)

All of these

Air supplied and furnace temperature

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Furnace Technology
Thermal efficiency of an open hearth furnace may be about __________ percent.

20

80

5

50

20

80

5

50

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Furnace Technology
The advantages of firing pulverised coal in the furnace lies in the fact that, it

All of these

Permits the use of high ash content coal

Accelerates the burning rate and economises on fuel consumption

Permits the use of low fusion point ash coal

All of these

Permits the use of high ash content coal

Accelerates the burning rate and economises on fuel consumption

Permits the use of low fusion point ash coal

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Furnace Technology
The thermal efficiency of a steel slab reheating furnace (walking beam type) may be about __________ percent.

40

15

70

85

40

15

70

85

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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 which of the waste heat recovery equipment, the flow of flue gas and air is alternately reversed after a fixed interval of time?

Furnace Technology The amount of combustible escaping uncon-sumed from the furnace, depends upon the

Furnace Technology Thermal efficiency of an open hearth furnace may be about __________ percent.

Furnace Technology The advantages of firing pulverised coal in the furnace lies in the fact that, it

Furnace Technology The thermal efficiency of a steel slab reheating furnace (walking beam type) 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 which of the waste heat recovery equipment, the flow of flue gas and air is alternately reversed after a fixed interval of time?

Furnace Technology
The amount of combustible escaping uncon-sumed from the furnace, depends upon the

Furnace Technology
Thermal efficiency of an open hearth furnace may be about __________ percent.

Furnace Technology
The advantages of firing pulverised coal in the furnace lies in the fact that, it

Furnace Technology
The thermal efficiency of a steel slab reheating furnace (walking beam type) may be about __________ percent.