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Fuels and Combustion

Fuels and Combustion
Stoichiometric combustion of 12 kg of carbon requires __________ of oxygen.

All of these
1kg mole
22.4 Nm³
32 kg

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Fuels and Combustion
Gross calorific value will be equal to the net calorific value for

C₂H₂
CO
H₂
C₂H₆

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Fuels and Combustion
A particular coal is said to be free burning when it

Gives smokeless burning
None of these
Shows little or no fusing action
Burns completely

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Fuels and Combustion
Which of the following has the highest calorific value?

Peat
Sub-bituminous coal
Lignite
Anthracite

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

15, 000
10, 000
25, 000
5000

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Fuels and Combustion
Coking time in beehive coke oven is about

12 hours
2-3 days
Two weeks
One week

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