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Fuels and Combustion

Fuels and Combustion
High pressure coal gasification is employed in __________ process.

None of these
Winkler
Lurgi
Kopper-Totzek

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Fuels and Combustion
The fuel ratio of a coal is

Both A and B
Helpful in estimation of its rank
Neither A nor B
The ratio of its percentage of fixed carbon to that of volatile matter

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Fuels and Combustion
A fuel containing carbon and carbon monoxide (but containing no hydrogen or its compounds) is burnt in pure oxygen at constant pressure. Its gross calorific value as compared to net calorific value will be

More
Same
Less
Data insufficient; can't be predicted

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Fuels and Combustion
The ratio of maximum adiabatic flame temperature in air to that in pure oxygen is always

Unpredicatable
1
> 1

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Fuels and Combustion
With increase in the oxygen content of the coal, its __________ decreases.

Both A & B
Caking power
Neither A nor B
Calorific value

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

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

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