Related Questions

Abrasion index of blast furnace coke should be around __________ percent.
A 20
B 35
C 80
D 55
Coke is added in the blast furnace to
A Reduce & melt the iron ore
B Increase the fluidity of slag
C Remove sulphur & phosphorus from molten metal
D None of these
Blast furnace gas compared to coke oven gas has
A Lower ignition temperature
B Narrower limit of inflammability
C Higher calorific value
D Lower theoretical flame temperature
The coke in the charge of blast furnace
A Controls the grade of pig iron
B Acts as an iron bearing mineral
C Supplies heat to reduce ore and melt the iron
D Forms a slag by combining with impurities
Coke oven gas is a better fuel than blast furnace gas, because of its higher
A Calorific value, cleanliness and relatively low distribution cost (due to its low specific gravity)
B Adiabatic flame temperature
C Heat release rate (thus requiring smaller combustion chamber)
D All of the above
Size of blast furnace grade coke is __________ mm.
A 25-80
B 0-15
C 15-25
D >100
Coke oven gas compared to blast furnace gas is
A More explosive and inflammable
B Less poisonous
C Lighter
D All of the above
Blast furnace coke is made from coal by
A Low temperature carbonisation
B High temperature carbonisation
C Medium temperature carbonisation
D Heating the coal in an oven in presence of air
Caking index of coal blend used for blast furnace coke making is about
A 8
B 12
C 22
D 36
Out of the following, which is the most important parameter for the blast furnace grade coke?
A CSR & CRI
B Ash content
C Moisture content
D Volatile matter content

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