Fuels and Combustion A coal having high volatile matter content will None of these Give less yield of tar and gas on carbonisation Have a very high calorific value Burn with a small non-smoky flame None of these Give less yield of tar and gas on carbonisation Have a very high calorific value Burn with a small non-smoky flame ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion Which of the following petrographic constituents of coal is non-coking? Clarain Fussain Durain Vitrain Clarain Fussain Durain Vitrain ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion Ratio of primary air to secondary air increases with increase in the rank of coal, because the Oxygen content progressively decreases High rank coals have higher amount of volatile matter Calorific value of the coal increases Ratio of fixed carbon to volatile matter increases Oxygen content progressively decreases High rank coals have higher amount of volatile matter Calorific value of the coal increases Ratio of fixed carbon to volatile matter increases ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion The main drawback of supplying more excess air in the combustion of fuel is the Intermittant and uncontrolled combustion of the fuel High exit flue gas temperature from the furnace Excessive power requirement of air blower Enhanced sensible heat loss in the flue gas Intermittant and uncontrolled combustion of the fuel High exit flue gas temperature from the furnace Excessive power requirement of air blower Enhanced sensible heat loss in the flue gas ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion With increase in calorific value of fuels, their adiabatic flame temperatures Decrease Increase Remain unchanged May increase or decrease ; depends on the quantity of products of combustion Decrease Increase Remain unchanged May increase or decrease ; depends on the quantity of products of combustion ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion Very __________ coals are completely devoid of cokability i.e, it is non coking. Young Both A & B Neither A nor B Mature Young Both A & B Neither A nor B Mature ANSWER DOWNLOAD EXAMIANS APP
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