Coking coals are invariably____________________?

Related Mcqs:

1. Very ______________ coals are completely devoid of cokability i.e., it is non-coking ?

   A. Young
   B. Mature
   C. Both A & B
   D. Neither A nor B

2. ‘Fat coals’ are those coals which have very high____________________?

   A. Caking capacity
   B. Volatile matter content
   C. Fusion point of its ash
   D. Inherent moisture content

3. Prime coking coal is always blended with medium or non- coking coal before carbonisation__________________?

   A. To check against its excessive swelling during heating, which may exert high pressure and
   damage coke oven walls
   B. Because, it alone produces unreactive coke
   C. Both A. and B.
   D. Neither A. nor B.

4. Coals used for the generation of producer gas should have ____________________?

   A. High caking index
   B. Low fusion point of ash
   C. High volatile matter content
   D. Very low ash content (8-10%)

5. Which of the following petrographic constituents of coal is non-coking ?

   A. Vitrain
   B. Clarain
   C. Durain
   D. Fussain

6. A good coking coal should have high ______________ content?

   A. Ash
   B. Sulphur & phosphorus
   C. Moisture
   D. None of these

7. Assam (India) coals suffers mainly from the disadvantage of high ______________ content?

   A. Ash
   B. Volatile matter
   C. Sulphur (4-6%)
   D. Moisture

8. Which of the following is coking ?

   A. Vitrain
   B. Fussain
   C. Both A. & B.
   D. Neither A. nor B.

9. 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

10. Coking time in a commercial high temperature coal carbonisation plant is about ______________ hours?

    A. 6
    B. 18
    C. 28
    D. 36