A. 4
B. 96
C. 20
D. 40
A. Contributes to its heating value
B. Affects the quality of steel produced as cracks develop on the surface while rolling the steel
C. Both A. and B.
D. Neither A. nor B.
Sulphur in metallurgical coal__________________? Read More »
Fuels and Combustion A. Iron sulphate
B. Iron silicate
C. Lime and magnesia
D. All A., B. and C.
Fusion point of coal ash increases with increase in its ____________ content? Read More »
Fuels and Combustion A. 900
B. 4200
C. 7500
D. 2000
Calorific value of coke oven gas is around ______________ Kcal/Nm3? Read More »
Fuels and Combustion A. 8
B. 12
C. 22
D. 36
Caking index of coal blend used for blast furnace coke making is about_________________? Read More »
Fuels and Combustion A. Has higher calorific value
B. Is harder and stronger
C. Is not subjected to washing
D. Has low quantity of mineral matter
A coal with high ash content___________________? Read More »
Fuels and Combustion A. Coal tar
B. Bitumen
C. Molasses
D. None of these
Which of the following is not a binder for coal briquetting ? Read More »
Fuels and Combustion A. 12 hours
B. 2-3 days
C. One week
D. Two weeks
Coking time in beehive coke oven is about ___________________? Read More »
Fuels and Combustion A. Calorific value of the fuel
B. Flame temperature achieved
C. Speed of combustion of fuel
D. Heat transfer rate to the stock in the furnace
A. Is equal to the heat of formation
B. Is always negative
C. Can’t be known without calculating it
D. Is always positive
The heat of combustion of a fuel___________________? Read More »
Fuels and Combustion