Fuels and Combustion
Which of the following is not a by-product recovered in a high temperature coal carbonisation plant?

Ethylene
Napthalene
Benzol
Pitch-cresosote mixture (PCM)

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Fuels and Combustion
Cannel coal

All of these
Is non-coking
Has a high volatile matter content and burns with a luminous smoky flame
Is a non-banded coal which can be ignited easily with a match stick or candle flame, hence is so named

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Fuels and Combustion
Calorific value of

Light paraffinic fuel oils is lower than that of equivalent olefins
Light paraffinic fuel oils is higher than that of equivalent olefins
N-paraffin is lower than that of iso-paraffins of the same compounds
Light paraffinic fuel oils is equal to that of equivalent olefins

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