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Fuels and Combustion

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

2000
300
5000
10000

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

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

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Fuels and Combustion
A sooty flame can be made non-luminous by

Admitting more air
Admitting more gas
Shutting gas supply
Shutting air supply

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Fuels and Combustion
Flue gas obtained on complete combustion of pure acetylene (a hydrocarbon fuel) will contain

CO
CO₂
H₂O
Both B & C

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Fuels and Combustion
Caking index of the coal blend used for the manufacture of metallurgical coke should be around

48
5
40
21

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Fuels and Combustion
Which of the following is not a binder for coal briquetting?

Coal tar
None of these
Bitumen
Molasses

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