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Fuels and Combustion

Fuels and Combustion
Orsat apparatus

All of these
Can
Gives flue gas analysis on dry basis
Determines N₂ in flue gas indirectly

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Fuels and Combustion
If oxygen content in the flue gas rises too high, fuel is being wasted by

Dry gas/stack gas loss
Moisture loss
None of these
Incomplete combustion

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Fuels and Combustion
'Wobbe index' is a characteristic of

Liquid fuels
Fat coals
Gaseous fuels
Solid fuels

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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.

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

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Fuels and Combustion
Benzene is used

As a perfume
As an explosive
For making insecticides (e.g., DDT, BHC etc.), detergent & rubber (SBR)
As a motor fuel

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Fuels and Combustion
When steam is passed over coal resulting in the endothermic reaction represent by, C + H₂O = CO + H₂, it is called the __________ of coal.

Coalification
Gasification
Carbonisation
Oxidation

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