A. 80 and 97
B. 95 and 100
C. 40 and 70
D. 25 and 97
Related Mcqs:
- Shatter index of the coke is a measure of its___________________?
A. Strength
B. Bulk density
C. ReactivityD. None of these
- Volatile matter content of metallurgical coke may be around ______________ percent?
A. 1-2
B. 10-15
C. 22-26
D. 30-33 - Quantity of coke produced from metallurgical coal may be around _____________ percent?
A. 30
B. 50
C. 75
D. 95 - Caking index of the coal blend used for the manufacture of metallurgical coke should be around__________________?
A. 5
B. 21
C. 40
D. 48 - Desirable “Micum Index” values of metallurgical coke are ___________________?
A. M40 > 78% and M10 < 10%
B. M40 > 4% and M10 10% and M10 98% and M10 < 2% - A good metallurgical coke should have very low__________________?
A. Sulphur & phosphorous content
B. Porosity
C. Fusion point of its ash
D. Hardness & strength - Higher percentage of ash in coal meant for the production of metallurgical grade coke ___________________?
A. Decreases the hardness of coke
B. Decreases the abrasion resistance of coke
C. Causes brittleness in steel
D. None of these - During coal carbonisation process, the conversion of semi-coke to coke is accompanied by an increase in the _______________ of the mass?
A. Density
B. Porosity
C. Electrical resistivity
D. None of these - Abrasion index of blast furnace coke should be around _____________ percent?
A. 20
B. 35
C. 55
D. 80 - Of the total tar present in raw coke oven gas, the tar recovered in primary cooler is about _______________ percent?
A. 5
B. 25
C. 55
D. 75
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