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

Related Mcqs:

1. Caking index of coal blend used for blast furnace coke making is about_________________?

   A. 8
   B. 12
   C. 22
   D. 36

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

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

3. 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

4. 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%

5. 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

6. Caking index of a coal is a measure of its _______________________?

   A. Abradability
   B. Reactivity
   C. Agglutinating (binding) properties
   D. Porosity

7. 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

8. 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

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

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

10. A good metallurgical coke should have very low__________________?

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