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Fuels and Combustion

Fuels and Combustion
Junker's calorimeter is used to determine the calorific value of

Pulverised coal
None of these
Fuel oil
Gaseous fuels

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Fuels and Combustion
In low temperature carbonisation of coal, the

Yield of coke oven gas is 290 Nm³ /ton dry coal
Volatile matter in coke is zero
Temperature maintained is 700°C
Yield of tar is about 3% of dry coal

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Fuels and Combustion
High excess air in combustion of fuels results in

Incomplete combustion
Smoky flame
Increased fuel consumption
None of these

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Fuels and Combustion
Incomplete combustion of a fuel is characterised by the high __________ in the flue gas.

Temperature
Oxygen
Carbon monoxide
Smoke

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Fuels and Combustion
Low temperature carbonisation of coal produces

Metallurgical coke
Soft coke
No by-products
Very low calorific value coke oven gas

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Fuels and Combustion
Coking time in narrow by-product coke ovens is around __________ hours.

8
18
80
48

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