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Fuels and Combustion

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

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

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Fuels and Combustion
To avoid fire by spontaneous combustion of coal due to its low temperature oxidation, it should be stored in

Shallow and small piles
Large heaps with small surface to volume ratio
Closed space without any ventilation facility
Fine sizes without the presence of any lump

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Fuels and Combustion
Presence of __________ in a dry gaseous fuel does not contribute to its calorific value.

Sulphur
Carbon
Oxygen
Hydrogen

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Fuels and Combustion
Gross and net calorific value of a fuel will be the same

Under no circumstances
If its ash content is zero
Ifits carbon content is very low
If its hydrogen/hydrogen compound content is zero

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Fuels and Combustion
Ash content in the middling coal (a byproduct of coal washeries) in India ranges between __________ percent.

35 to 45
55 to 75
75
15 to 25

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Fuels and Combustion
'Wind loss' resulting from unscientific storage of coal may be the order of about __________ percent.

14.5
2.5
10.5
7.5

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