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Fuels and Combustion

Fuels and Combustion
Calorific value of a typical dry anthracite coal may be around __________ Kcal/kg.

1000
15000
8000
4000

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Fuels and Combustion
The calorific value of 'LPG' (50% propane + 50% butane) is about __________ kcal/Nm³.

15, 000
5000
10, 000
25, 000

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Fuels and Combustion
Blast furnace coke is made from coal by

Medium temperature carbonisation
High temperature carbonisation
Low temperature carbonisation
Heating the coal in an oven in presence of air

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

H₂ content in the coke oven gas is more
Calorific value of the coke oven gas is lower
Yield of ammonia is less
Aromatic content of tar is low

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Fuels and Combustion
Which of the following has the highest flame speed?

C₂H₆
CH₄
H₂
CO

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Fuels and Combustion
Which of the following fuel gases is heavier than air?

Blast furnace gas
Water gas
Natural gas
Coke oven gas

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