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Fuels and Combustion

Fuels and Combustion
Combustion reaction of fuels is a/an __________ reaction.

None of these
Exothermic
Endothermic
Auto catalytic

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Fuels and Combustion
A coal containing very high percentage of durain is called __________ coal.

Non-banded
Boghead
Bright
Splint

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Fuels and Combustion
Naphthalene is used for making

All of these
Unsaturated polyesters
Drug intermediates e.g. β-naphthol
Insecticides (e.g. moth balls)

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Fuels and Combustion
Coal tar fuels (CTF) as compared to petroleum based fuel oils have higher

Higher C/H ratio
Sulphur content
Calorific value
Difference in gross & net calorific value

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Fuels and Combustion
Wood charcoal is obtained by the destructive distillation of wood. It is used in the production of activated carbon, which is not used for the

Decolourisation of sugar
Solvent recovery from air and gases
Electrode manufacture
Absorption of gases and vapor

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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.

85
70
105
145

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