Low temperature oxidation and spontaneous combustion of freshly mined coal is accentuated, if It is stored in tall heaps It contains large amount of volatile matter Smaller fines are stored in large quantity All of these TRUE ANSWER : ? YOUR ANSWER : ?
Power alcohol as compared to straight run gasoline has lower Viscosity Specific gravity Octane number Calorific value TRUE ANSWER : ? YOUR ANSWER : ?
Ash content in the coke produced from a coking coal having 20% ash may be around __________ percent. 18 6 12 24 TRUE ANSWER : ? YOUR ANSWER : ?
Which of the following has the highest calorific value? Lignite Sub-bituminous coal Peat Anthracite TRUE ANSWER : ? YOUR ANSWER : ?
Which of the following will generate maximum volume of product of complete combustion (Nm³/Nm³ of fuel) ? Natural gas Blast furnace gas Carburetted water gas Producers TRUE ANSWER : ? YOUR ANSWER : ?
The calorific value of a gas of composition CO₂ = 20%, H₂ = 50%, CH₄ = 30%, is y. If the composition of gas is changed to H₂ = 50%, CH₄ = 30%, CO₂ = 10%, N₂ = 10%, then the calorifice value will be 0.95 y Y 1.05 y 1.8 y TRUE ANSWER : ? YOUR ANSWER : ?
Washing of coal decreases its Ash content Both B and C Mineral matter content Caking index TRUE ANSWER : ? YOUR ANSWER : ?
High amount of sulphur and phosphorous in coke causes None of these Brittleness of steel made by using it Decrease in its calorific value Increase in its strength TRUE ANSWER : ? YOUR ANSWER : ?
Blast furnace gas is a very poisonous gas because of its predominantly high __________ content. CO₂ CH₄ H₂O CO TRUE ANSWER : ? YOUR ANSWER : ?
Function of secondary air in pulverised coal firing is to Reduce primary air requirement Ensure efficient burning of coal around the burner Dry the coal Transport the coal to the burner TRUE ANSWER : ? YOUR ANSWER : ?