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Fuels and Combustion

Fuels and Combustion
Laboratory gas is obtained by the cracking of

Gasoline
Fuel oil
Kerosene
Diesel

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Fuels and Combustion
Coking time in narrow by-product coke ovens is around __________ hours.

80
8
48
18

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Fuels and Combustion
__________ prohibits the use of alcohols directly in petrol engines.

Low flash point
High cost & availability
Low octane number
Low calorific value

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Fuels and Combustion
Combustion of pulverised coal compared to the lumpy coal

Provides better control of furnace temperature
All of these
Facilitates combustion with lower excess air
Provides higher thermal efficiency & flame temperature

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Fuels and Combustion
Main constituents of purified Lurgi gas are

H₂, CmHn & CO₂
CO, H₂ & CH₄
CO₂, O₂ & CO
N₂, H₂ & CO₂

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Fuels and Combustion
Gross and net calorific value of a fuel will be the same

Under no circumstances
If its ash content is zero
Ifits carbon content is very low
If its hydrogen/hydrogen compound content is zero

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MORE MCQ ON Fuels and Combustion

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