Fuels and Combustion Low temperature oxidation of stored coal results in the Decrease in its caking power & calorific value Decrease in its carbon & hydrogen content All of these Increase in its oxygen content Decrease in its caking power & calorific value Decrease in its carbon & hydrogen content All of these Increase in its oxygen content ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion The main function of primary air in pulverised coal fired burner is to Dry and transport the coal Burn CO to CO₂ Preheat the tertiary air used for complete combustion of CO to CO₂ Have proper combustion by supplying it around the burner Dry and transport the coal Burn CO to CO₂ Preheat the tertiary air used for complete combustion of CO to CO₂ Have proper combustion by supplying it around the burner ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion Coal is pulverised before burning in large capacity boiler furnaces mainly to Provide trouble free operation Ensure its complete combustion Enhance its calorific value Facilitate easy ash removal Provide trouble free operation Ensure its complete combustion Enhance its calorific value Facilitate easy ash removal ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion For maximum discharge through a chimney, its height should be 200 meters Equal to the height of the hot gas column producing draught Infinitely long More than 105.7 metres 200 meters Equal to the height of the hot gas column producing draught Infinitely long More than 105.7 metres ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion A coal having high volatile matter content will Give less yield of tar and gas on carbonisation None of these Have a very high calorific value Burn with a small non-smoky flame Give less yield of tar and gas on carbonisation None of these Have a very high calorific value Burn with a small non-smoky flame ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion If oxygen content in the flue gas rises too high, fuel is being wasted by Incomplete combustion None of these Dry gas/stack gas loss Moisture loss Incomplete combustion None of these Dry gas/stack gas loss Moisture loss ANSWER DOWNLOAD EXAMIANS APP
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