Fuels and Combustion Which of the following is a primary fuel? Wood charcoal Natural gas Gasoline Blast furnace coke Wood charcoal Natural gas Gasoline Blast furnace coke ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion With increases in carbonisation temperature Tar yield increases Hydrogen percentage in the coke oven gas decreases Methane percentage in the coke oven gas increases Coke even gas yield increases Tar yield increases Hydrogen percentage in the coke oven gas decreases Methane percentage in the coke oven gas increases Coke even gas yield increases ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion For which pair of the fuel gases, calorific value (C.V.) of one fuel is almost double that of the other on volume basis (i.e., kcal/Nm³ ), while the C.V. is same on weight basis (i.e., kcal/kg) ? Sewage gas and gobar gas Propane and LPG Propane and acetylene F. gas and coke oven gas Sewage gas and gobar gas Propane and LPG Propane and acetylene F. gas and coke oven gas ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion A good metallurgical coke Should have high porosity Should be brittle Should have low fusion point of its ash Must contain moderate quantities of ash, moisture, sulphur and volatile matters Should have high porosity Should be brittle Should have low fusion point of its ash Must contain moderate quantities of ash, moisture, sulphur and volatile matters ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion Combustion of pulverised coal compared to the lumpy coal All of these Provides higher thermal efficiency & flame temperature Facilitates combustion with lower excess air Provides better control of furnace temperature All of these Provides higher thermal efficiency & flame temperature Facilitates combustion with lower excess air Provides better control of furnace temperature ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion During coal carbonisation process, the conversion of semi-coke to coke is accompanied by an increase in the __________ of the mass. None of these Electrical resistivity Porosity Density None of these Electrical resistivity Porosity Density ANSWER DOWNLOAD EXAMIANS APP
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