Fuels and Combustion The function of secondary combustion air is to None of these Completely burn the volatile matter Pneumatically convey the pulverised coal Burn the lumpy coal None of these Completely burn the volatile matter Pneumatically convey the pulverised coal Burn the lumpy coal ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion Coal tar fuels (CTF) as compared to petroleum based fuel oils have higher Sulphur content Higher C/H ratio Calorific value Difference in gross & net calorific value Sulphur content Higher C/H ratio Calorific value Difference in gross & net calorific value ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion Explosion limit of blast furnace gas is 37 to 71% gas in gas-air mixture. It means that the blast furnace gas will explode when burnt in a confined space, if its concentration in the gas-air mixture is __________ percent. None of these < 37% In between 37 & 71% >71% None of these < 37% In between 37 & 71% >71% ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion Low temperature oxidation of coal resulting from bad storage conditions does not decrease its Caking power Oxygen content Hydrogen content Calorific value Caking power Oxygen content Hydrogen content Calorific value ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion Preheating of a gaseous fuel results in increased Quantity of flue gas Flame length Flame temperature Ignition temperature Quantity of flue gas Flame length Flame temperature Ignition temperature ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion Fuel gases containing hydrocarbons (ie.g. coke oven gas) are not preheated before burning, mainly because It reduces its flame temperature tremendously There are chances of explosion during preheating The hydrocarbons crack thereby choking and fouling the heat transfer surface by carbon soot It reduces its calorific value tremendously It reduces its flame temperature tremendously There are chances of explosion during preheating The hydrocarbons crack thereby choking and fouling the heat transfer surface by carbon soot It reduces its calorific value tremendously ANSWER DOWNLOAD EXAMIANS APP
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