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Fuels and Combustion

Fuels and Combustion
Combustion reaction of fuels is a/an __________ reaction.

Auto catalytic
Endothermic
Exothermic
None of these

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

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

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Fuels and Combustion
Artificial draught produced by a fan can be controlled by the

All of these
Speed of the fan
Damper
Variation in the pitch of the fan blades

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Fuels and Combustion
Water gas constitutes mainly of

CH₄ & H₂
CO & H₂
CO & N₂
CO₂ & H₂

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Fuels and Combustion
A coal gasifier opearating at 20 atm. (e.g. Lugri gasifier) as compared to one operating at atmospheric pressure (e.g. Kopper-Totzek or Winkler gasifier) will produce a gas having

Higher carbon monoxide content
None of these
Lower carbon dioxide content
Higher methane content and thus higher calorific value

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Fuels and Combustion
Coal is heated in presence of air to a temperature of about __________ °C, while determining its ash content for proximate analysis.

1100
950
750
500

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