Fuels and Combustion Which of the following accounts for maximum energy loss in a boiler? Incomplete combustion Flue gases Unburnt carbon in flue gases Ash content in the fuel Incomplete combustion Flue gases Unburnt carbon in flue gases Ash content in the fuel ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion Presence of free moisture in coal during its high temperature carbonisation Protects the volatile products from pyrolysis (cracking) in the presence of hot coke and hot oven walls None of these Reduces the coking time Increases the loss of fine coal dust from the ovens when charging Protects the volatile products from pyrolysis (cracking) in the presence of hot coke and hot oven walls None of these Reduces the coking time Increases the loss of fine coal dust from the ovens when charging ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion Coke oven gas produced by high temperature carbonisation of coal (as compared to that produced by low temperature carbonisation), has Higher calorific value Both A & B Lower hydrogen content Neither A nor B Higher calorific value Both A & B Lower hydrogen content Neither A nor B ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion The ratio of % total carbon obtained in the ultimate analysis of coke and % fixed carbon obtained in the proximate analysis is always < 1 1 Unpredictable > 1 < 1 1 Unpredictable > 1 ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion Coalification means the Direct hydrogenation of coal Complete combustion of coal Process of conversion of lignite into anthracite Underground gasification of coal Direct hydrogenation of coal Complete combustion of coal Process of conversion of lignite into anthracite Underground gasification of coal ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion Lignite is A coking coal A high rank coal A black banded coal which burns with a non-smoky yellowish flame Can be used for gasification and steam generation A coking coal A high rank coal A black banded coal which burns with a non-smoky yellowish flame Can be used for gasification and steam generation ANSWER DOWNLOAD EXAMIANS APP
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