Fuels and Combustion Preheating of a gaseous fuel results in increased Flame temperature Quantity of flue gas Ignition temperature Flame length Flame temperature Quantity of flue gas Ignition temperature Flame length ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion If CO₂ is not fully absorbed by the KOH solution meant for its absorption in the orsat apparatus, it will appear as N₂ O₂ SO₂ CO N₂ O₂ SO₂ CO ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion During the carbonisation of coal All tar is evolved at < 600°C All of these Evolution of H₂ and formation of methane and aromatics occur at > 700°C Hard semi-coke starts shrinking at 600°C All tar is evolved at < 600°C All of these Evolution of H₂ and formation of methane and aromatics occur at > 700°C Hard semi-coke starts shrinking at 600°C ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion Which of the following coke has the least percentage of ash? Metallurgical coke Foundary coke Beehive coke Petroleum coke Metallurgical coke Foundary coke Beehive coke Petroleum coke ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion Beehive coke oven Produces coke with very poor strength Takes 2-3 days for coking of coal but requires no external fuel for heating Gives larger yield of coke (around 85%) as compared to by-product ovens Facilitates by-products recovery Produces coke with very poor strength Takes 2-3 days for coking of coal but requires no external fuel for heating Gives larger yield of coke (around 85%) as compared to by-product ovens Facilitates by-products recovery ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion Ratio of primary air to secondary air increases with increase in the rank of coal, because the Ratio of fixed carbon to volatile matter increases Calorific value of the coal increases Oxygen content progressively decreases High rank coals have higher amount of volatile matter Ratio of fixed carbon to volatile matter increases Calorific value of the coal increases Oxygen content progressively decreases High rank coals have higher amount of volatile matter ANSWER DOWNLOAD EXAMIANS APP
EXAMIANS