Fuels and Combustion
Orsat apparatus is meant for

Direct determination of nitrogen in flue gas by absorbing it in ammoniacal cuprous chloride
Gravimetric analysis of flue gas
None of these
Finding out combustion efficiency

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Fuels and Combustion
Prime coking coal is always blended with medium or non- coking coal before ear-bonisation

Neither A nor B
Both A & B
To check against its excessive swelling during heating, which may exert high pressure and damage coke oven walls
Because, it alone produces unreactive coke

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Fuels and Combustion
Cannel coal

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
All of these
Is non-coking

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