Desirable “Micum Index” values of metallurgical coke are ___________________?

Related Mcqs:

1. “Micum Index” of a coke is a measure of its___________________?

   A. Reactivity
   B. Porosity
   C. Bulk density
   D. Hardness & strength

2. Caking index of the coal blend used for the manufacture of metallurgical coke should be around__________________?

   A. 5
   B. 21
   C. 40
   D. 48

3. 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

4. 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

5. Volatile matter content of metallurgical coke may be around ______________ percent?

   A. 1-2
   B. 10-15
   C. 22-26
   D. 30-33

6. A good metallurgical coke should have very low__________________?

   A. Sulphur & phosphorous content
   B. Porosity
   C. Fusion point of its ash
   D. Hardness & strength

7. Quantity of coke produced from metallurgical coal may be around _____________ percent?

   A. 30
   B. 50
   C. 75
   D. 95

8. 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.

9. 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

10. 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