Fuels and Combustion A sooty flame can be made non-luminous by Shutting air supply Shutting gas supply Admitting more air Admitting more gas Shutting air supply Shutting gas supply Admitting more air Admitting more gas ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion The calorific value of 'LPG' (50% propane + 50% butane) is about __________ kcal/Nm³. 15, 000 5000 25, 000 10, 000 15, 000 5000 25, 000 10, 000 ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion The average molecular weight of a flue gas having the composition by volume as CO₂ = 25%, O₂ = 25%, N₂ = 50% will be 27.6 47.3 23 42.9 27.6 47.3 23 42.9 ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion High rate of heating of coke ovens Produces larger size coke May damage its walls due to abrupt excessive swelling of coal None of these Increases the time of carbonisation Produces larger size coke May damage its walls due to abrupt excessive swelling of coal None of these Increases the time of carbonisation ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion A carbonaceous fuel (containing no H₂ or hydrocarbons) is burnt and the resulting flue gas contains 21% CO₂. It means that 21% excess air has been used for combustion 21% excess oxygen has been used for combustion Complete combustion of fuel has taken place No excess air has been used for combustion 21% excess air has been used for combustion 21% excess oxygen has been used for combustion Complete combustion of fuel has taken place No excess air has been used for combustion ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion Function of secondary air in pulverised coal firing is to Ensure efficient burning of coal around the burner Transport the coal to the burner Reduce primary air requirement Dry the coal Ensure efficient burning of coal around the burner Transport the coal to the burner Reduce primary air requirement Dry the coal ANSWER DOWNLOAD EXAMIANS APP
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