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Fuels and Combustion

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.

15-30
43832
70-100
150-200

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Fuels and Combustion
Calorific value of dry wood may be around __________ Kcal/kg.

500
5000
50
5

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Fuels and Combustion
Main constituent of natural gas is

CH₄ (upto 90%)
H₂
C₂H₆
C₃H₈

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Fuels and Combustion
Desirable "Micum Index" values of metal-lurical coke are

M40 > 4% and M10 < 80%
M40 > 98% and M10 < 2%
M40 > 78% and M10 < 10%
M40 > 10% and M10 < 78%

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

C₂H₆
CO
H₂
C₂H₂

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Fuels and Combustion
A fuel with high heat release rate will

Require smaller combustion chamber
Have high adiabatic flame temperature
Have high calorific value
None of these

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