Fuels and Combustion Prime coking coal is always blended with medium or non- coking coal before ear-bonisation Both A & B To check against its excessive swelling during heating, which may exert high pressure and damage coke oven walls Because, it alone produces unreactive coke Neither A nor B Both A & B To check against its excessive swelling during heating, which may exert high pressure and damage coke oven walls Because, it alone produces unreactive coke Neither A nor B ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion Preheating of __________ the flame temperature. Either the fuel or the air does not affect Combustion air decreases The gaseous fuel before combustion decreases Either the fuel or the air or both, increases Either the fuel or the air does not affect Combustion air decreases The gaseous fuel before combustion decreases Either the fuel or the air or both, increases ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion Function of secondary air in pulverised coal firing is to Transport the coal to the burner Dry the coal Reduce primary air requirement Ensure efficient burning of coal around the burner Transport the coal to the burner Dry the coal Reduce primary air requirement Ensure efficient burning of coal around the burner ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion The main drawback of supplying more excess air in the combustion of fuel is the Enhanced sensible heat loss in the flue gas Excessive power requirement of air blower Intermittant and uncontrolled combustion of the fuel High exit flue gas temperature from the furnace Enhanced sensible heat loss in the flue gas Excessive power requirement of air blower Intermittant and uncontrolled combustion of the fuel High exit flue gas temperature from the furnace ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion Short/intense flame is produced during combustion of gaseous fuel by using Low amount/current of combustion air Very little excess air High amount/current of combustion air Preheated secondary air Low amount/current of combustion air Very little excess air High amount/current of combustion air Preheated secondary air ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion Cannel coal Is non-coking Has a high volatile matter content and burns with a luminous smoky flame All of these Is a non-banded coal which can be ignited easily with a match stick or candle flame, hence is so named Is non-coking Has a high volatile matter content and burns with a luminous smoky flame All of these Is a non-banded coal which can be ignited easily with a match stick or candle flame, hence is so named ANSWER DOWNLOAD EXAMIANS APP
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