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 Semi-bituminous coal containing 25% ash and 20% volatile matter Anthracite containing 10% volatile matter and 8% ash Bituminous coal containing 20% ash and 25% volatile matter Coke breeze containing 25% ash and 2% volatile matter Semi-bituminous coal containing 25% ash and 20% volatile matter Anthracite containing 10% volatile matter and 8% ash Bituminous coal containing 20% ash and 25% volatile matter ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion (64-132) rank coal (ASTM) means a coal with 64% None of these Ash and a heating value of 13, 200 BTU/1b Fixed carbon and a heating value of 132 BTU/1b Fixed carbon and having a heat value of 13, 200 BTU/1b None of these Ash and a heating value of 13, 200 BTU/1b Fixed carbon and a heating value of 132 BTU/1b Fixed carbon and having a heat value of 13, 200 BTU/1b ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion High rate of heating of coke ovens Produces larger size coke None of these May damage its walls due to abrupt excessive swelling of coal Increases the time of carbonisation Produces larger size coke None of these May damage its walls due to abrupt excessive swelling of coal Increases the time of carbonisation ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion Furnace oil consumption in a furnace for a given duty employing preheated combination air (at 300° ) may be reduced by about __________ percent as compared to the use of atmospheric combustion air. 20 10 35 5 20 10 35 5 ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion Presence of force moisture in coal is most disadvantageous during its Pulverisation Storage Transportation and handling Washing Pulverisation Storage Transportation and handling Washing ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion Junker's calorimeter is used to determine the calorific value of None of these Gaseous fuels Fuel oil Pulverised coal None of these Gaseous fuels Fuel oil Pulverised coal ANSWER DOWNLOAD EXAMIANS APP
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