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Fuels and Combustion

Fuels and Combustion
Incomplete combustion of fuel in the furnace is judged by high __________ of the flue gases.

CO content
CO₂ content
Dew point
O₂ content

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Fuels and Combustion
During its calorific value determination by bomb calorimeter, coal is combusted by

Oxygen
None of these
Oxygen enriched air
Air

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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
70-100
150-200

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Fuels and Combustion
Bomb calorimeter is used for the determination of calorific value of the __________ fuels.

Gaseous
Liquid
Solid
Both B and C

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Fuels and Combustion
A coal having higher volatile matter content will necessarily have lower

Calorific value
Ash fusion temperature
Caking index
Ignition temperature

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Fuels and Combustion
For maximum discharge through a chimney, its height should be

Equal to the height of the hot gas column producing draught
More than 105.7 metres
Infinitely long
200 meters

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