Fuels and Combustion During combustion of coal on grate, clinker formation is increased by the Use of preheated primary air All of these Low fusion point of ash (< 1100° C) Use of thick fire bed Use of preheated primary air All of these Low fusion point of ash (< 1100° C) Use of thick fire bed ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion A coal having high ratio of volatile matter to fixed carbon as compared to a coal having low ratio of volatile matter to fixed carbon Is more difficult to ignite and produces a shorter flame Requires smaller combustion space and less secondary air None of these Is less liable to spontaneous combustion on storage Is more difficult to ignite and produces a shorter flame Requires smaller combustion space and less secondary air None of these Is less liable to spontaneous combustion on storage ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion Dry air requirement for burning 1 Nm³ of CO to CO₂ may be around __________ Nm³. 0.87 2.4 11.4 1.75 0.87 2.4 11.4 1.75 ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion Adiabatic flame temperature of a fuel is dependent on the initial temperature of Air Fuel Both A & B Neither A nor B Air Fuel Both A & B Neither A nor B ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion Gasification of the solid fuel converts its organic part into combustible by interaction with air/oxygen and steam so as to obtain a secondary gaseous fuel of high calorific value having no ash. Gasification reactions are normally carried out at about __________ °C. 900-1000 400-500 1400-1500 1700-1800 900-1000 400-500 1400-1500 1700-1800 ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion Combustion of pulverised coal compared to the lumpy coal All of these Facilitates combustion with lower excess air Provides higher thermal efficiency & flame temperature Provides better control of furnace temperature All of these Facilitates combustion with lower excess air Provides higher thermal efficiency & flame temperature Provides better control of furnace temperature ANSWER DOWNLOAD EXAMIANS APP
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