Fuels and Combustion Low temperature oxidation and spontaneous combustion of freshly mined coal is accentuated, if It is stored in tall heaps All of these Smaller fines are stored in large quantity It contains large amount of volatile matter It is stored in tall heaps All of these Smaller fines are stored in large quantity It contains large amount of volatile matter ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion Highly caking coals Both B and C Produce strong coke Produce weak coke May damage the coke oven walls during carbonisation Both B and C Produce strong coke Produce weak coke May damage the coke oven walls during carbonisation ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion Which of the following is not increased by using preheated combustion air in place of ordinary air at room temperature? Heat transfer rate to the stock in the furnace Speed of combustion of fuel Calorific value of the fuel Flame temperature achieved Heat transfer rate to the stock in the furnace Speed of combustion of fuel Calorific value of the fuel Flame temperature achieved ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion Very __________ coals are completely devoid of cokability i.e, it is non coking. Both A & B Young Neither A nor B Mature Both A & B Young Neither A nor B Mature ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion Calorific value of coal middling generated in coal washeries during washing of coal may be around __________ Kcal/kg. 8000 1000 6000 4000 8000 1000 6000 4000 ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion Bright coal Contains more than 90% durain Contains mainly vitrain & clarain and is generally coking Is non-coking Contains more than 90% fussain Contains more than 90% durain Contains mainly vitrain & clarain and is generally coking Is non-coking Contains more than 90% fussain ANSWER DOWNLOAD EXAMIANS APP
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