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Fuels and Combustion

Fuels and Combustion
__________ is used as jet engine fuel.

Diesel
LPG
Kerosene
Petrol

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Fuels and Combustion
Gasification of the solid fuel converts its organic part into combustible by interaction with air/oxygen and steam so as to obtain a secondary gaseous fuel of high calorific value having no ash. Gasification reactions are normally carried out at about __________ °C.

1700-1800
400-500
1400-1500
900-1000

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Fuels and Combustion
High amount of sulphur and phosphorous in coke causes

None of these
Increase in its strength
Decrease in its calorific value
Brittleness of steel made by using it

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Fuels and Combustion
Steam is intermittently admitted into the fuel bed during the production of producer gas to

Increase the combustion rate
Minimise the chances of clinker formation
Convert CO to CO₂
Increase the gas production rate

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Fuels and Combustion
During coal carbonisation process, the conversion of semi-coke to coke is accompanied by an increase in the __________ of the mass.

Electrical resistivity
Porosity
None of these
Density

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Fuels and Combustion
Actual flame temperature is always lower than the adiabatic flame temperature, because there is

Always loss of heat from the flame
Both A & B
Neither A nor B
No possibility of obtaining complete combustion at high temperature

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