A good metallurgical coke should have very low__________________?

Related Mcqs:

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

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

2. 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%

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

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

4. 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

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

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

6. 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

7. Narrow coke ovens as compared to wider coke ovens_________________?

   A. Produce smaller coke
   B. Produce stronger coke
   C. Require less time of carbonisation
   D. All A., B. and C.

8. Width of the coke oven towards coke side is slightly more than that on pusher side to____________________?

   A. Facilitate easy discharging of coke as it swells during carbonisation
   B. Facilitate uniform heating of the oven
   C. Increase the output of the coke
   D. None of these

9. 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.

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