Fuels and Combustion Deficiency of combustion air during combustion of a gaseous fuel Shortens the flame Both A & B Lengthens the flame Causes heat loss of fuel by its partial combustion Shortens the flame Both A & B Lengthens the flame Causes heat loss of fuel by its partial combustion ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion Which of the following fuels is generally not used in thermal power plant boiler firing? Furnace oil, light diesel oil and tar/PCM F. gas, coke oven gas and L.D. converter gas Coal middling from washeries Pulverised coking coal Furnace oil, light diesel oil and tar/PCM F. gas, coke oven gas and L.D. converter gas Coal middling from washeries Pulverised coking coal ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion Presence of phosphorous in metallurgical coal Badly affects the quality of steel Is not undersirable Reduces its calorific value Increases its caking power Badly affects the quality of steel Is not undersirable Reduces its calorific value Increases its caking power ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion The main drawback of supplying more excess air in the combustion of fuel is the 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 Intermittant and uncontrolled combustion of the fuel High exit flue gas temperature from the furnace Excessive power requirement of air blower ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion In low temperature carbonisation of coal as compared to high temperature carbonisation __________ produced is less. Yield of ammonia present in coke oven gas Yield percentage of coke Free carbon content in tar Difference in gross & net calorific value of the coke oven gas Yield of ammonia present in coke oven gas Yield percentage of coke Free carbon content in tar Difference in gross & net calorific value of the coke oven gas 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. In between 37 & 71% >71% < 37% None of these In between 37 & 71% >71% < 37% None of these ANSWER DOWNLOAD EXAMIANS APP
EXAMIANS