Fuels and Combustion Washing of coal decreases its Caking index Both B and C Mineral matter content Ash content Caking index Both B and C Mineral matter content Ash content 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 Complete combustion of fuel has taken place 21% excess air has been used for combustion No excess air has been used for combustion 21% excess oxygen has been used for combustion Complete combustion of fuel has taken place 21% excess air has been used for combustion No excess air has been used for combustion 21% excess oxygen has been used for combustion ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion A good metallurgical coke Should be brittle Should have low fusion point of its ash Should have high porosity Must contain moderate quantities of ash, moisture, sulphur and volatile matters Should be brittle Should have low fusion point of its ash Should have high porosity Must contain moderate quantities of ash, moisture, sulphur and volatile matters ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion Water gas constitutes mainly of CO & N₂ CO & H₂ CH₄ & H₂ CO₂ & H₂ CO & N₂ CO & H₂ CH₄ & H₂ CO₂ & H₂ ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion Too much of excess air in combustion results in high All of these Percentage of oxygen in flue gases Stack gas temperature Fuel consumption for the same heat load All of these Percentage of oxygen in flue gases Stack gas temperature Fuel consumption for the same heat load 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
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