Insitu theory and drift theory are related to the Origin of petroleum oil Origin of coal Variation of coal quality with depth Coalification TRUE ANSWER : ? YOUR ANSWER : ?
Advantages of fluidised bed combustion are Reduced NOx formation in flue gas High heat transfer rate All of these Lower furnace operating temperature TRUE ANSWER : ? YOUR ANSWER : ?
Blast furnace gas compared to coke oven gas has Higher calorific value Narrower limit of inflammability Lower ignition temperature Lower theoretical flame temperature TRUE ANSWER : ? YOUR ANSWER : ?
If oxygen content in the flue gas rises too high, fuel is being wasted by Moisture loss Incomplete combustion None of these Dry gas/stack gas loss TRUE ANSWER : ? YOUR ANSWER : ?
As the equilibrium moisture content of the coal increases, its Swelling number decreases Bulk density decreases Calorific value increases Swelling number increases TRUE ANSWER : ? YOUR ANSWER : ?
Bomb calorimeter can be used to determine the __________ of the coal. Both A & B Sulphur content Neither A nor B Calorific value TRUE ANSWER : ? YOUR ANSWER : ?
Coke oven gas constitutes mainly of H₂ & CH₄ CH₄ & CO H₂ & CO H₂ & CO₂ TRUE ANSWER : ? YOUR ANSWER : ?
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 Oxygen content progressively decreases Calorific value of the coal increases High rank coals have higher amount of volatile matter TRUE ANSWER : ? YOUR ANSWER : ?
KOH solution used in orsat apparatus absorbs Neither A nor B CO₂ SO₂ Both A & B TRUE ANSWER : ? YOUR ANSWER : ?
For the case of a fuel gas undergoing combustion with air, if the air/fuel ratio is increased, the adiabatic flame temperature will Decrease Increase Increase or decrease depending on the fuel type Not change TRUE ANSWER : ? YOUR ANSWER : ?