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Fuels and Combustion

Fuels and Combustion
Hard coke is manufactured from

Lignite
Bituminous coal
Anthracite
Semi-anthracite

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Fuels and Combustion
In low temperature carbonisation (as compared to high temperature carbonisation) of coal

Ammonia yield is more
Aliphatic tar is produced
Free carbon in tar is more
All of these

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Fuels and Combustion
Correct viscosity of furnace oil at the burner tip for proper atomisation is about 25 centistokes. To reduce the viscosity of high viscosity furnace oil (250 centistokes) to the correct atomisation viscosity (i.e. 25 cst), it should be preheated to about____°C.

70
145
105
85

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Fuels and Combustion
During combustion of a gaseous fuel, the presence of a non-luminous flame is an indication of the

None of these
Complete combustion
Incomplete combustion
High oxygen in flue gas

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Fuels and Combustion
A coal having higher volatile matter content will necessarily have lower

Ignition temperature
Calorific value
Ash fusion temperature
Caking index

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Fuels and Combustion
High pressure coal gasification is employed in __________ process.

None of these
Winkler
Kopper-Totzek
Lurgi

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