Which of the following is a measure of the agglutinating (i.e., binding) property of coal ?

Related Mcqs:

1. 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

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

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

3. Cannel coal and boghead coal are the examples of _________________?

   A. Humic coals
   B. Liptobiolites
   C. Sapropelic coals
   D. None of these

4. (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

5. 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

6. 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.

7. Combustion of pulverised coal as compared to that of lump coal ________________?

   A. Develops a non-luminous flame
   B. Develops a low temperature flame
   C. Can be done with less excess air
   D. Provides a lower rate of heat release

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