Yield of charcoal in high temperature carbonisation of wood is about _____________ percent?

Related Mcqs:

1. In low temperature carbonisation of coal as compared to high temperature carbonisation _____________ produced is less?

   A. Difference in gross & net calorific value of the coke oven gas
   B. Free carbon content in tar
   C. Yield percentage of coke
   D. Yield of ammonia present in coke oven gas

2. Tar yield in the low temperature and high temperature carbonisation of dry coal may be respectively ______________ percent?

   A. 3 & 10
   B. 10 & 3
   C. 10 & 20
   D. 15 & 8

3. In low temperature carbonisation (as compared to high temperature carbonisation) of coal__________________?

   A. Ammonia yield is more
   B. Aliphatic tar is produced
   C. Free carbon in tar is more
   D. All A., B. and C.

4. Coke oven gas produced by high temperature carbonisation of coal (as compared to that produced by low temperature carbonisation), has_________________?

   A. Higher calorific value
   B. Lower hydrogen content
   C. Both A. and B.
   D. Neither A. nor B.

5. In high temperature carbonisation (as compared to low temperature carbonisation) of coal___________________?

   A. Coke oven gas yield is more
   B. Tar yield is less but free carbon in tar is more
   C. Calorific value of coke oven gas is less
   D. All A., B. and C.

6. In high temperature carbonisation of coal compared to low temperature carbonisation ?

   A. Yield of ammonia is less
   B. Aromatic content of tar is low
   C. H2 content in the coke oven gas is more
   D. Calorific value of the coke oven gas is lower

7. In high temperature carbonisation (as compared to low temperature carbonisation) of coal, the______________?

   A. Gas yield is less
   B. Tar yield is more
   C. Ignition temperature of coke produced is less
   D. Aromatic content of tar produced is more

8. Wood charcoal is obtained by the destructive distillation of wood. It is used in the production of activated carbon, which is not used for the____________________?

   A. Decolourisation of sugar
   B. Solvent recovery from air and gases
   C. Absorption of gases and vapor
   D. Electrode manufacture

9. Yield of pitch from distillation of high temperature tar is around _____________ percent?

   A. 10
   B. 25
   C. 65
   D. 90

10. 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