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Fuels and Combustion

Fuels and Combustion
Yield of blast furnace gas is about __________ Nm³ /ton of pig iron.

5000
2000
300
10000

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Fuels and Combustion
For long flame and easy ignition, the coal used should have

High volatile matter
Low ash
High calorific value
High ash

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Fuels and Combustion
Fusion point of coal ash generally varies from 1000 to 1700° C. Ash having fusion point less than __________ °C is liable to form clinker.

1400
1350
1100
1250

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Fuels and Combustion
If oxygen content in the flue gas rises too high, fuel is being wasted by

Moisture loss
Dry gas/stack gas loss
None of these
Incomplete combustion

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Fuels and Combustion
Gas yield in the Kopper-Totzek coal gasifier is about __________ Nm³/ton coal (ash = 35%).

1500
5000
3500
150

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Fuels and Combustion
Which is the heaviest fuel gas out of the following?

Coke oven gas
Carburetted water gas
Blast furnace gas
Water gas

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