Fuels and Combustion
Stack heat losses can be minimised by

Maintaining proper draft in the furnace
Using low c.v. fuels
Oxygen enrichment of combustion air
Controlling the excess air

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Fuels and Combustion
Orsat apparatus is meant for

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

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