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Fuels and Combustion

Fuels and Combustion
Calorific value of coke oven gas is around __________ Kcal/Nm³.

900
7500
2000
4200

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Fuels and Combustion
Percentage of nitrogen in blast furnace gas may be around

80
5
55
25

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Fuels and Combustion
Which will have the least volatile matter and hence will be the most difficult to ignite?

Aanthracite
Semi-bituminous coal
Bituminous coal
Coke

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Fuels and Combustion
Nitrogen present in the flue gas is determined in the orsat apparatus by absorbing it in

Pyrogallol solution
None of these
Ammoniacal cuprous chloride
KOH

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Fuels and Combustion
Coals used for the generation of producer gas should have

High caking index
Very low ash content (8-10%)
Low fusion point of ash
High volatile matter content

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Fuels and Combustion
A coal having higher volatile matter content, has lower

Smoking tendency on burning
Chance of catching fire during storage in open space
Ignition temperature
Coke oven gas yield on carbonisation

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