Fuels and Combustion Very __________ coals are completely devoid of cokability i.e, it is non coking. Neither A nor B Both A & B Mature Young Neither A nor B Both A & B Mature Young ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion Fussain All of these Is non-coking, but when blended with highly coking coal, controls its swelling and produces high strength coke on carbonisation Has highest fixed carbon and lowest volatile matter content of all the four banded components of coal Is friable, charcoal like substance All of these Is non-coking, but when blended with highly coking coal, controls its swelling and produces high strength coke on carbonisation Has highest fixed carbon and lowest volatile matter content of all the four banded components of coal Is friable, charcoal like substance ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion Increase in ash content of blast furnace coke Increases its consumption in the furnace Decreases its hardness and abrasion resistance Does not affect its consumption in the furnace Reduces its consumption in the furnace Increases its consumption in the furnace Decreases its hardness and abrasion resistance Does not affect its consumption in the furnace Reduces its consumption in the furnace 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 Bituminous coal containing 20% ash and 25% volatile matter Anthracite containing 10% volatile matter and 8% ash Semi-bituminous coal containing 25% ash and 20% volatile matter Coke breeze containing 25% ash and 2% volatile matter Bituminous coal containing 20% ash and 25% volatile matter Anthracite containing 10% volatile matter and 8% ash Semi-bituminous coal containing 25% ash and 20% volatile matter ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion Which of the following petrological constitutes is responsible for bright and lustrous black band of bituminous coal? Durain Fussain Clarain Vitrain Durain Fussain Clarain Vitrain ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion With increase in C/H ratio of a fuel, the dew point of flue gases Remains same Decreases Increases May increase or decrease ; depends on the type of fuel Remains same Decreases Increases May increase or decrease ; depends on the type of fuel ANSWER DOWNLOAD EXAMIANS APP
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