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Fuels and Combustion

Fuels and Combustion
Which of the following has the highest calorific value (kcal/Nm³) ?

Gobar gas
Carburetted water gas
Natural gas
LPG

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Fuels and Combustion
Orsat apparatus

Determines N₂ in flue gas indirectly
All of these
Can
Gives flue gas analysis on dry basis

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Fuels and Combustion
High amount of sulphur and phosphorous in coke causes

Increase in its strength
Brittleness of steel made by using it
Decrease in its calorific value
None of these

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

Peat
Anthracite
Sub-bituminous coal
Lignite

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Fuels and Combustion
When the coal is heated in absence of air, it is called its

Carbonisation
Deoxidation
Coalification
Gasification

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Fuels and Combustion
Coke compared to the coal from which it has been made, contains

More carbon
All of these
Greater percentage of ash
Less volatile matter

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