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Fuels and Combustion

Fuels and Combustion
The gasification reaction represented by, C + H₂O = CO + H₂, is

Endothermic
Exothermic
Autocatalytic
Catalytic

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Fuels and Combustion
L.D. converter gas (produced in steel plant) comprises mainly of

CO₂ & H₂
CO (upto 65%) & CO₂
CO & O₂
CO₂ & O₂

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Fuels and Combustion
Low temperature oxidation of coal is accelerated by the

Storage in large heaps
All of these
Storage in compressed piles
Absence of porous or friable particles

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Fuels and Combustion
In Lurgi coal gasifier,

Entrainment of solids is higher
Low carbon conversion efficiency is achieved
Larger quantity of coal can be processed
Coking coals cannot be used

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

Natural gas
Producer gas
Carburetted water gas
Liquified petroleum gas

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Fuels and Combustion
Calorific value of bituminous coal may be around __________ Kcal/kg.

6500
500
1500
20000

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