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Fuels and Combustion

Fuels and Combustion
Which is the most matured coal?

Semi-anthracite
Lignite
Bituminous
Anthracite

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Fuels and Combustion
Ash content in the coke produced from a coking coal having 20% ash may be around __________ percent.

18
12
24
6

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Fuels and Combustion
Which of the following coal gasification processes will produce gas having maximum methane content?

All of these
Kopper-Totzek process
Winkler process
Lurgi process

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Fuels and Combustion
Highly reactive coke have lower

Coke reactivity index (CRI)
Critical air blast (CAB) value
Porosity
Both B and C

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Fuels and Combustion
Too much of excess air in combustion results in high

Percentage of oxygen in flue gases
Stack gas temperature
All of these
Fuel consumption for the same heat load

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Fuels and Combustion
Low temperature oxidation of coal during storage does not decrease its

None of these
Calorific value
Caking power
Oxygen content

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