Fuels and Combustion Fussain 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 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 ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion Presence of free moisture in coal during its high temperature carbonisation Reduces the coking time Protects the volatile products from pyrolysis (cracking) in the presence of hot coke and hot oven walls Increases the loss of fine coal dust from the ovens when charging None of these Reduces the coking time Protects the volatile products from pyrolysis (cracking) in the presence of hot coke and hot oven walls Increases the loss of fine coal dust from the ovens when charging None of these ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion Ratio of primary air to secondary air increases with increase in the rank of coal, because the Ratio of fixed carbon to volatile matter increases Calorific value of the coal increases High rank coals have higher amount of volatile matter Oxygen content progressively decreases Ratio of fixed carbon to volatile matter increases Calorific value of the coal increases High rank coals have higher amount of volatile matter Oxygen content progressively decreases ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion Size of blast furnace grade coke is __________ mm. 15-25 >100 0-15 25-80 15-25 >100 0-15 25-80 ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion Which of the following coke has the least percentage of ash? Metallurgical coke Foundary coke Beehive coke Petroleum coke Metallurgical coke Foundary coke Beehive coke Petroleum coke ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion Which of the following petrological constitutes is responsible for bright and lustrous black band of bituminous coal? Clarain Vitrain Fussain Durain Clarain Vitrain Fussain Durain ANSWER DOWNLOAD EXAMIANS APP
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