Fuels and Combustion High amount of sulphur and phosphorous in coke causes Increase in its strength None of these Brittleness of steel made by using it Decrease in its calorific value Increase in its strength None of these Brittleness of steel made by using it Decrease in its 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. In between 37 & 71% None of these < 37% >71% In between 37 & 71% None of these < 37% >71% ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion Actual flame temperature is always lower than the adiabatic flame temperature, because there is Both A & B Neither A nor B Always loss of heat from the flame No possibility of obtaining complete combustion at high temperature Both A & B Neither A nor B Always loss of heat from the flame No possibility of obtaining complete combustion at high temperature ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion Main constituent of natural gas is CH₄ (upto 90%) H₂ C₃H₈ C₂H₆ CH₄ (upto 90%) H₂ C₃H₈ C₂H₆ ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion With increase in the temperature of carbonisation of coal Calorific value of the coke oven gas decreases due to cracking of hydrocarbons which is not compensated by increase in CO & H? content Hydrogen content of coke oven gas increases due to cracking of hydrocarbons Methane content in the coke oven gas decreases and carbon monoxide content increases All of these Calorific value of the coke oven gas decreases due to cracking of hydrocarbons which is not compensated by increase in CO & H? content Hydrogen content of coke oven gas increases due to cracking of hydrocarbons Methane content in the coke oven gas decreases and carbon monoxide content increases All of these ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion Spontaneous combustion of coal on storage results due to Low temperature oxidation Storage in large heaps with small surface to volume ratio Inadequate ventilation All of these Low temperature oxidation Storage in large heaps with small surface to volume ratio Inadequate ventilation All of these ANSWER DOWNLOAD EXAMIANS APP
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