Of the total tar present in raw coke oven gas, the tar recovered in primary cooler is about __________ percent. 5 55 25 75 TRUE ANSWER : ? YOUR ANSWER : ?
Ratio of primary air to secondary air increases with increase in the rank of coal, because the High rank coals have higher amount of volatile matter Oxygen content progressively decreases Calorific value of the coal increases Ratio of fixed carbon to volatile matter increases TRUE ANSWER : ? YOUR ANSWER : ?
In high temperature carbonisation (as compared to low temperature carbonisation) of coal All of these Coke oven gas yield is more Calorific value of coke oven gas is less Tar yield is less but free carbon in tar is more TRUE ANSWER : ? YOUR ANSWER : ?
Low temperature carbonisation of coal produces Metallurgical coke Soft coke Very low calorific value coke oven gas No by-products TRUE ANSWER : ? YOUR ANSWER : ?
Insitu theory and drift theory are related to the Coalification Variation of coal quality with depth Origin of coal Origin of petroleum oil TRUE ANSWER : ? YOUR ANSWER : ?
Short/intense flame is produced during combustion of gaseous fuel by using Preheated secondary air Very little excess air High amount/current of combustion air Low amount/current of combustion air TRUE ANSWER : ? YOUR ANSWER : ?
Which of the following is not a binder for coal briquetting? Bitumen Coal tar Molasses None of these TRUE ANSWER : ? YOUR ANSWER : ?
Main component of sewage gas produced during aneorobic decomposition of organic waste (by suitable bacteria) during sewage disposal is N₂ H₂ CO₂ CH₄ TRUE ANSWER : ? YOUR ANSWER : ?
Volumetric ratio of N₂ to O₂ in dry atmospheric air is 0.79 4.76 3.76 0.21 TRUE ANSWER : ? YOUR ANSWER : ?
In low temperature carbonisation of coal as compared to high temperature carbonisation __________ produced is less. Free carbon content in tar Yield percentage of coke Difference in gross & net calorific value of the coke oven gas Yield of ammonia present in coke oven gas TRUE ANSWER : ? YOUR ANSWER : ?