Fuels and Combustion Combustion of pulverised coal compared to the lumpy coal Provides better control of furnace temperature Provides higher thermal efficiency & flame temperature All of these Facilitates combustion with lower excess air Provides better control of furnace temperature Provides higher thermal efficiency & flame temperature All of these Facilitates combustion with lower excess air ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion The main function of primary air in pulverised coal fired burner is to Preheat the tertiary air used for complete combustion of CO to CO₂ Dry and transport the coal Have proper combustion by supplying it around the burner Burn CO to CO₂ Preheat the tertiary air used for complete combustion of CO to CO₂ Dry and transport the coal Have proper combustion by supplying it around the burner Burn CO to CO₂ ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion The optimum percentage of excess air for combustion depends upon the __________ of the fuel. Calorific value Sulphur content Ignition temperature Type (solid, liquid or gaseous) Calorific value Sulphur content Ignition temperature Type (solid, liquid or gaseous) ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion For maximum discharge through a chimney, its height should be Infinitely long Equal to the height of the hot gas column producing draught More than 105.7 metres 200 meters Infinitely long Equal to the height of the hot gas column producing draught More than 105.7 metres 200 meters ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion Soft coke is not A domestic fuel None of these Produced by low temperature carbonisation of coal Used in blast furnaces A domestic fuel None of these Produced by low temperature carbonisation of coal Used in blast furnaces ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion Ionisation potential applied across the electrodes of electrostatic tar precipitator is around 230 V DC 60 KV DC 60 KV AC 230 V AC 230 V DC 60 KV DC 60 KV AC 230 V AC ANSWER DOWNLOAD EXAMIANS APP
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