Coal is heated in absence of air for 7 minutes at a temperature of about __________ °C, during its volatile matter determination for proximate analysis. 550 750 950 1150 TRUE ANSWER : ? YOUR ANSWER : ?
With increase in calorific value of fuels, their adiabatic flame temperatures May increase or decrease ; depends on the quantity of products of combustion Increase Decrease Remain unchanged TRUE ANSWER : ? YOUR ANSWER : ?
Coke oven gas burns with an yellowish flame, because of the presence of H₂ CH₄ NH₃ CO₂ TRUE ANSWER : ? YOUR ANSWER : ?
Washing of coal is done to reduce the Mineral matter Both B and C Inherent impurities Adhering impurities TRUE ANSWER : ? YOUR ANSWER : ?
The weathering index of a coal Is a measure of its size stability, when stored & exposed to weather Is a measure of its caking tendency Gives an idea of the fusion temperature of ash Is related to its calorific value TRUE ANSWER : ? YOUR ANSWER : ?
High temperature in gasification of coal favours High production of CO₂ Both B and C Low production of CO₂ High production of CO TRUE ANSWER : ? YOUR ANSWER : ?
Mott and Wheeler test is conducted on coke to find its Phosphorus content Abradability Volatile matter content Reactivity with O₂ TRUE ANSWER : ? YOUR ANSWER : ?
Which of the following petrological constitutes is responsible for bright and lustrous black band of bituminous coal? Durain Vitrain Clarain Fussain TRUE ANSWER : ? YOUR ANSWER : ?
Main use of soft coke is as __________ fuel. Foundary None of these Domestic Blastfurnace TRUE ANSWER : ? YOUR ANSWER : ?
Adiabatic flame temperature of a fuel is dependent on the initial temperature of Neither A nor B Fuel Both A & B Air TRUE ANSWER : ? YOUR ANSWER : ?