Fuels and Combustion
Which of the following gaseous fuels has the highest net calorific value (kcal/Nm³)?

Producer gas
Liquified petroleum gas
Natural gas
Carburetted water gas

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Fuels and Combustion
Anthracite coal

Burns with short, bluish, yellow-tipped flame producing very little smoke
Is essentially a coking coal
Contains more volatile matter than bituminous coal
Ignites more easily than bituminous coal

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Fuels and Combustion
Orsat apparatus is meant for

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

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