Fuels and Combustion Low temperature oxidation and spontaneous combustion of freshly mined coal is accentuated, if All of these It contains large amount of volatile matter Smaller fines are stored in large quantity It is stored in tall heaps All of these It contains large amount of volatile matter Smaller fines are stored in large quantity It is stored in tall heaps ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion Which of the following would require least amount of secondary air for combustion? Coke breeze containing 25% ash and 2% volatile matter Anthracite containing 10% volatile matter and 8% ash Bituminous coal containing 20% ash and 25% volatile matter Semi-bituminous coal containing 25% ash and 20% volatile matter Coke breeze containing 25% ash and 2% volatile matter Anthracite containing 10% volatile matter and 8% ash Bituminous coal containing 20% ash and 25% volatile matter Semi-bituminous coal containing 25% ash and 20% volatile matter ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion In low temperature carbonisation (as compared to high temperature carbonisation) of coal Free carbon in tar is more Aliphatic tar is produced All of these Ammonia yield is more Free carbon in tar is more Aliphatic tar is produced All of these Ammonia yield is more ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion Fuel consumption in coke making can be reduced by Dry quenching of coke Preheating, blending and de-ashing the coal Stamped charging of coal All of these Dry quenching of coke Preheating, blending and de-ashing the coal Stamped charging of coal All of these ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion High temperature in gasification of coal favours Low production of CO₂ High production of CO₂ Both B and C High production of CO Low production of CO₂ High production of CO₂ Both B and C High production of CO ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion The advantage of firing pulverised coal in the furnace lies in the fact, that it Accelerates the burning rate and economises on fuel combustion Permits the use of low fusion point ash coal All of these Permits the use of high ash content coal Accelerates the burning rate and economises on fuel combustion Permits the use of low fusion point ash coal All of these Permits the use of high ash content coal ANSWER DOWNLOAD EXAMIANS APP
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