Fuels and Combustion With increase in the temperature of carbonisation of coal Methane content in the coke oven gas decreases and carbon monoxide content increases Hydrogen content of coke oven gas increases due to cracking of hydrocarbons 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 Methane content in the coke oven gas decreases and carbon monoxide content increases Hydrogen content of coke oven gas increases due to cracking of hydrocarbons 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 ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion Blast furnace gas is a very poisonous gas because of its predominantly high __________ content. CO H₂O CH₄ CO₂ CO H₂O CH₄ CO₂ ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion Rate of low temperature oxidation of coal due to bad storage conditions Decreases with increase in surface area Does not vary with increase in surface area Is more for low volatile coal compared to high volatile coal Is accelerated by storage in large heaps with small surface to volume ratio Decreases with increase in surface area Does not vary with increase in surface area Is more for low volatile coal compared to high volatile coal Is accelerated by storage in large heaps with small surface to volume ratio ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion Advantages of fluidised bed combustion are Reduced NOx formation in flue gas All of these Lower furnace operating temperature High heat transfer rate Reduced NOx formation in flue gas All of these Lower furnace operating temperature High heat transfer rate ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion A carbonaceous fuel (containing no H₂ or hydrocarbons) is burnt and the resulting flue gas contains 21% CO₂. It means that Complete combustion of fuel has taken place 21% excess oxygen has been used for combustion 21% excess air has been used for combustion No excess air has been used for combustion Complete combustion of fuel has taken place 21% excess oxygen has been used for combustion 21% excess air has been used for combustion No excess air has been used for combustion ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion Furnace oil consumption in a furnace for a given duty employing preheated combination air (at 300° ) may be reduced by about __________ percent as compared to the use of atmospheric combustion air. 35 5 20 10 35 5 20 10 ANSWER DOWNLOAD EXAMIANS APP
EXAMIANS