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Fuels and Combustion

Fuels and Combustion
Producer gas comprises mainly of

CO & H₂
CO₂ & N₂
CO₂ & H₂
CO & N₂

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Fuels and Combustion
Bomb calorimeter is used to determine the (where, GCV - Gross Calorific Value. NCV - Net Calorific Value.)

GCV at constant volume
NCV at constant pressure
NCV at constant volume
GCV at constant pressure

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Fuels and Combustion
Dust content in raw blast furnace gas is about __________ gm/Nm³ , hence it is cleaned to the dust level of about < 10 mg /Nm³ before use.

43832
15-30
150-200
70-100

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Fuels and Combustion
Gross heating value of coal is __________ the net heating value.

Lower than
None of these
Same as
Higher than

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Fuels and Combustion
Caking index of coal blend used for blast furnace coke making is about

8
12
22
36

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Fuels and Combustion
A sooty flame can be made non-luminous by

Admitting more air
Admitting more gas
Shutting air supply
Shutting gas supply

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