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

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

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

3. Gray King Assay and Swelling Index of a coal is a measure of its ____________________?

   A. Swelling characteristics
   B. Abradability
   C. Agglutinating properties
   D. Resistance to impact breakage

4. Caking coal is desirable for_________________?

   A. Burning on travelling grate
   B. Coke making
   C. Burning on firebars
   D. All A., B. and C.

5. 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

6. Softening temperature of coal ash is a measure of the _____________ of coal?

   A. Caking tendency
   B. Coking tendency
   C. Clinkering tendency
   D. Size stability

7. Highly caking coals_____________________?

   A. Produce weak coke
   B. Produce strong coke
   C. May damage the coke oven walls during carbonisation
   D. Both B. and C.

8. A coal having high ratio of volatile matter to fixed carbon as compared to a coal having low ratio of volatile matter to fixed carbon _________________?

   A. Is less liable to spontaneous combustion on storage
   B. Is more difficult to ignite and produces a shorter flame
   C. Requires smaller combustion space and less secondary air
   D. None of these

9. Yield of coke oven gas in low temperature carbonisation of coal is about ______________ Nm3 /ton of dry coal?

   A. 60
   B. 160
   C. 500
   D. 750

10. Commercial production of petrol from coal (as practised in a factory at Sasol in South Africa) is done by the ________________ of coal?

    A. Hydrogenation
    B. Gasification
    C. Carbonisation
    D. None of these