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Fuels and Combustion

Fuels and Combustion
Calorific value of coke even gas produced by low temperature carbonisation of coal is about __________ Kcal/Nm³.

10000
4000
2500
6500

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Fuels and Combustion
Pitch creosote mixture (PCM) as compared to furnace oil is a better fuel, because its

Emissivity factor is higher
Flue gas has lower dew point thereby facilitating more waste heat recovery
All of these
Sulphur content is lower

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Fuels and Combustion
Which of the following fuel gases will require maximum amount of air for combustion of 1 Nm³ gas ?

Producer gas
Water gas
Natural gas
Blast furnace gas

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Fuels and Combustion
Commercial production of petrol from coal (as practised in a factory at Sasol in South Africa) is done by the __________ of coal.

Carbonisation
None of these
Hydrogenation
Gasification

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Fuels and Combustion
Out of the following, which is the most important parameter for the blast furnace grade coke?

Ash content
Volatile matter content
Moisture content
CSR & CRI

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Fuels and Combustion
Explosion limit of blast furnace gas is 37 to 71% gas in gas-air mixture. It means that the blast furnace gas will explode when burnt in a confined space, if its concentration in the gas-air mixture is __________ percent.

None of these
In between 37 & 71%
< 37%
>71%

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