Fuels and Combustion The average molecular weight of a flue gas having the composition by volume as CO₂ = 25%, O₂ = 25%, N₂ = 50% will be 47.3 27.6 42.9 23 47.3 27.6 42.9 23 ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion Calorific value of gobar gas (containing CH₄ = 60% , H₂ = 10% ; CO₂ = 30%) may be about __________ Kcal/Nm³. 3200 5400 10200 1800 3200 5400 10200 1800 ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion In general, the limit of inflammability/explosion limit of fuel gases is widened by the Increase in gas pressure All of these Use of pure oxygen for combustion instead of air Increase in temperature (i.e. preheating) Increase in gas pressure All of these Use of pure oxygen for combustion instead of air Increase in temperature (i.e. preheating) ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion Too much of excess air in combustion results in high Percentage of oxygen in flue gases Stack gas temperature Fuel consumption for the same heat load All of these Percentage of oxygen in flue gases Stack gas temperature Fuel consumption for the same heat load All of these ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion Higher fuel combustion efficiency can not be achieved by Reducing sulphur content in the fuel Adopting proper fuel firing technique & fuel preparation Supplying correct amount of combustion air Preheating of fuel gases & combustion air Reducing sulphur content in the fuel Adopting proper fuel firing technique & fuel preparation Supplying correct amount of combustion air Preheating of fuel gases & combustion air ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion With increase in the time of carbonisation at a particular temperature (say 1000°C), the __________ percentage in coke oven gas increases. Unsaturated hydrocarbons Hydrogen Methane All of these Unsaturated hydrocarbons Hydrogen Methane All of these ANSWER DOWNLOAD EXAMIANS APP
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