The difference between total carbon and fixed carbon of coal will be minimum in case of___________________?

Related Mcqs:

1. 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

2. Out of the following fuels, the difference between gross and net calorific value will be minimum in case of___________________?

   A. Coke oven gas
   B. Water gas
   C. Natural gas
   D. Blast furnace gas

3. The ratio of % total carbon obtained in the ultimate analysis of coke and % fixed carbon obtained in the proximate analysis is always ___________________?

   A. 1
   B. < 1
   C. > 1
   D. Unpredictable

4. 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

5. Fixed carbon in coal is defined as______________________?

   A. That present in volatile matters
   B. The total quantity of carbon present in the coal
   C. Hundred minus the percentage of volatile matter, ash and moisture
   D. The one which is present in the residue after combustion

6. A fuel containing carbon and carbon monoxide (but containing no hydrogen or its compounds) is burnt in pure oxygen at constant pressure. Its gross calorific value as compared to net calorific value will be_________________?

   A. More
   B. Less
   C. Same
   D. Data insufficient; can’t be predicted

7. Out of the following fuels, the difference between the net and gross calorific value is maximum in case of_________________?

   A. Pitch
   B. Fuel oil
   C. Blast furnace gas
   D. Bituminous coal

8. 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

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

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

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