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Fuels and Combustion

Fuels and Combustion
Which of the following is not a by-product fuel?

Petrol
Refinery gas
Pitch
Blast furnace gas

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Fuels and Combustion
Eschka mixture, which is used for the determination of sulphur in coal, is a mixture of

MgO & Na₂CO₃
BaSO₄ & NaCl
MgCO₃ & NaCl
MgSO₄ & BaCl₂

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

None of these
Air
Oxygen
Oxygen enriched air

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Fuels and Combustion
Which of the following is not increased by using preheated combustion air in place of ordinary air at room temperature?

Heat transfer rate to the stock in the furnace
Flame temperature achieved
Calorific value of the fuel
Speed of combustion of fuel

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Fuels and Combustion
Volatile matter content of metallurgical coke may be around __________ percent.

10-15
1-2
22-26
30-33

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Fuels and Combustion
Stack (chimney) height in a big thermal power plant is dictated by the

Draught to be created
Pollution control aspect
None of these
Limitation of constructional facilities

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