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Fuels and Combustion

Fuels and Combustion
Cannel coal and boghead coal are the examples of

Humic coals
Liptobiolites
Sapropelic coals
None of these

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Fuels and Combustion
Eschka mixture, which is used for the determination of sulphur in coal, is a mixture of

MgCO₃ & NaCl
BaSO₄ & NaCl
MgSO₄ & BaCl₂
MgO & Na₂CO₃

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Fuels and Combustion
In low temperature carbonisation of coal, the

Temperature maintained is 700°C
Yield of tar is about 3% of dry coal
Volatile matter in coke is zero
Yield of coke oven gas is 290 Nm³ /ton dry coal

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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

Less
Same
Data insufficient; can't be predicted
More

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Fuels and Combustion
Light oil whose major component is benzol, is obtained by the distillation of crude tar in the temperature range of __________ °C.

280-300
80-170
250-270
200-300

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Fuels and Combustion
Which of the following coke has the least percentage of ash?

Foundary coke
Petroleum coke
Beehive coke
Metallurgical coke

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