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Fuels and Combustion

Fuels and Combustion
The ratio of % total carbon obtained in the ultimate analysis of coke and % fixed carbon obtained in the proximate analysis is always

1
< 1
Unpredictable
> 1

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Fuels and Combustion
Which of the following fuel gases is heavier than air?

Blast furnace gas
Natural gas
Water gas
Coke oven gas

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Fuels and Combustion
The most matured coal out of the following is

Semi-anthracite
Sub-bituminous
Bituminous
Lignite

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Fuels and Combustion
High temperature in gasification of coal favours

Both B and C
Low production of CO₂
High production of CO
High production of CO₂

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Fuels and Combustion
Blast furnace coke is made from coal by

Medium temperature carbonisation
High temperature carbonisation
Heating the coal in an oven in presence of air
Low temperature carbonisation

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Fuels and Combustion
During its calorific value determination by bomb calorimeter, coal is combusted by

Air
None of these
Oxygen
Oxygen enriched air

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