A. M40 > 78% and M10 < 10%
B. M40 > 4% and M10 10% and M10 98% and M10 < 2%
Related Mcqs:
- “Micum Index” of a coke is a measure of its___________________?
A. Reactivity
B. Porosity
C. Bulk density
D. Hardness & strength - Caking index of the coal blend used for the manufacture of metallurgical coke should be around__________________?
A. 5
B. 21
C. 40
D. 48 - Shatter index of metallurgical coke on 2 inches and 0.5 inch screen should be respectively around _______________ percent?
A. 80 and 97
B. 95 and 100
C. 40 and 70
D. 25 and 97 - 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 - Volatile matter content of metallurgical coke may be around ______________ percent?
A. 1-2
B. 10-15
C. 22-26
D. 30-33 - A good metallurgical coke should have very low__________________?
A. Sulphur & phosphorous content
B. Porosity
C. Fusion point of its ash
D. Hardness & strength - Quantity of coke produced from metallurgical coal may be around _____________ percent?
A. 30
B. 50
C. 75
D. 95 - Coke made in narrower by-product coke ovens (as compared to wider ovens) is _____________________?
A. Less reactive
B. Stronger
C. Smaller in size
D. All A., B. & C. - Degree of carbonisation of coal during coke making can be roughly judged by the ______________ of the coke produced?
A. Colour
B. Moisture content
C. Ash content
D. Volatile matter - 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
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