Cannel coal and boghead coal are the examples of _________________?

Related Mcqs:

1. Cannel coal__________________?

   A. Is non-coking
   B. Has a high volatile matter content and burns with a luminous smoky flame
   C. Is a non-banded coal which can be ignited easily with a match stick or candle flame, hence is
   so named
   D. All A., B. and C.

2. 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

3. 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

4. ombustion of pulverised coal compared to the lumpy coal __________________?

   CA. Provides better control of furnace temperature
   B. Facilitates combustion with lower excess air
   C. Provides higher thermal efficiency & flame temperature
   D. All A., B. & C.

5. (64-132) rank coal (ASTM) means a coal with 64%___________________?

   A. Fixed carbon and having a heat value of 13, 200 BTU/1b
   B. Ash and a heating value of 13, 200 BTU/1b
   C. Fixed carbon and a heating value of 132 BTU/1b
   D. None of these

6. 64-132) rank coal (ASTM) means a coal with 64%___________________?

   A. Fixed carbon and having a heating value around 13, 200 BTU/1b
   B. Ash and heating value around 13, 200 BTU/1b
   C. Fixed carbon and heating value around 132 BTU/1b
   D. None of these

7. 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.

8. A coal containing very high percentage of durain is called ______________ coal?

   A. Bright
   B. Splint
   C. Non-banded
   D. Boghead

9. The liquid used for the washing of coal in an industrial coal washery is a mixture of water and ____________________?

   A. Carbon tetrachloride
   B. Sand (40%)
   C. Mineral oil of high viscosity & specific gravity (1.6)
   D. None of these

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