Coke compared to the coal from which it has been made, contains More carbon Greater percentage of ash Less volatile matter All 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 : ?
Fusion point of coal ash increases with increase in its __________ content. Lime and magnesia Iron silicate All of these Iron sulphate TRUE ANSWER : ? YOUR ANSWER : ?
Blast furnace gas constitutes mainly of N₂ & H₂ N₂ & CH₄ N₂ & CO CH₄ & CO₂ TRUE ANSWER : ? YOUR ANSWER : ?
A coal containing very high percentage of durain is called __________ coal. Non-banded Splint Bright Boghead TRUE ANSWER : ? YOUR ANSWER : ?
Tar yield in the low temperature and high temperature carbonisation of dry coal may be respectively __________ percent. 15 & 8 10 & 3 10 & 20 3 & 10 TRUE ANSWER : ? YOUR ANSWER : ?
Higher percentage of ash in coal meant for the production of metallurgical grade coke None of these Causes brittleness in steel Decreases the hardness of coke Decreases the abrasion resistance of coke TRUE ANSWER : ? YOUR ANSWER : ?
Bomb calorimeter can be used to determine the __________ of the coal. Sulphur content Neither A nor B Both A & B Calorific value TRUE ANSWER : ? YOUR ANSWER : ?
Highly caking coals May damage the coke oven walls during carbonisation Produce weak coke Produce strong coke Both B and C TRUE ANSWER : ? YOUR ANSWER : ?