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

Related Mcqs:

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

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

2. Ash content in the coke produced from a coking coal having 20% ash may be around _____________ percent?

   A. 6
   B. 12
   C. 18
   D. 24

3. Quantity of coke oven gas produced by high temperature carbonisation of one ton of dry coal may be around ______________ Nm3?

   A. 30
   B. 300
   C. 3,000
   D. 30,000

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

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

5. 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

6. 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

7. 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

8. Coke oven gas produced by high temperature carbonisation of coal (as compared to that produced by low temperature carbonisation), has_________________?

   A. Higher calorific value
   B. Lower hydrogen content
   C. Both A. and B.
   D. Neither A. nor B.

9. Calorific value of coal middling generated in coal washeries during washing of coal may be around _____________ Kcal/kg?

   A. 1000
   B. 4000
   C. 6000
   D. 8000

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