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Fuels and Combustion

Fuels and Combustion
Main constituents of benzol are

Ammonia & phenol
Tar & creosote
Anthracene & phenol
Benzene, toluene & xylene

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Fuels and Combustion
Yield of charcoal in high temperature carbonisation of wood is about __________ percent.

50
10
25
75

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Fuels and Combustion
As time passes, the calorific value of stored coal

May increase or decrease (depends on the method of storage)
Remains unaltered
Increases
Decreases

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Fuels and Combustion
Fusion point of coal ash generally varies from 1000 to 1700° C. Ash having fusion point less than __________ °C is liable to form clinker.

1100
1250
1350
1400

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Fuels and Combustion
Calorific value of bituminous coal may be around __________ Kcal/kg.

6500
500
1500
20000

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Fuels and Combustion
Blast furnace gas burns with a bluish flame, because of the presence of

CO
CH₄
S
CO₂

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