Eschka mixture, which is used for the determination of sulphur in coal, is a mixture of _____________________?

Related Mcqs:

1. 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

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. Initial pressure of oxygen introduced into the ‘bomb’ of the bomb calorimeter for determination of calorific value of coal/fuel oil may be around _____________ atm?

   A. 3-5
   B. 25-30
   C. 60-65
   D. 95-100

4. During its calorific value determination by bomb calorimeter, coal is combusted by _________________?

   A. Air
   B. Oxygen
   C. Oxygen enriched air
   D. None of these

5. Coal is heated in absence of air for 7 minutes at a temperature of about ______________ °C, during its volatile matter determination for proximate analysis?

   A. 550
   B. 750
   C. 950
   D. 1150

6. Explosion limit of blast furnace gas is 37 to 71% gas in gas-air mixture. It means that the blast furnace gas will explode when burnt in a confined space, if its concentration in the gas-air mixture is _______________ percent?

   A. 71%
   C. In between 37 & 71%
   D. None of these

7. Coal tar fuel – 200 (CTF 200) is a mixture of __________________?

   A. Pitch and creosote oil
   B. Light oil and pitch
   C. Anthracene and crecosote oil
   D. Solar oil and pitch

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

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

9. (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

10. 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