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FUELS AND COMBUSTION

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

5000
2000
10000
300

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Fuels and Combustion
Degree of carbonisation of coal during coke making can be roughly judged by the __________ of the coke produced.

Colour
Ash content
Moisture content
Volatile matter

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Fuels and Combustion
Ignition temperature of a fuel in air is __________ that in pure oxygen.

More than
Either more or less; depends on the type of fuel
Less than
Equal to

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Fuels and Combustion
The average molecular weight of a flue gas having the composition by volume as CO₂ = 25%, O₂ = 25%, N₂ = 50% will be

23
47.3
42.9
27.6

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Fuels and Combustion
High sulphur (4-6%) coal in India are found in

Madhya Pradesh
Bengal
Assam
Andhra Pradesh

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