By-products are _____________ recovered in ‘Beehive ovens’ ?

Related Mcqs:

1. Coke made in narrower by-product coke ovens (as compared to wider ovens) is _____________________?

   A. Less reactive
   B. Stronger
   C. Smaller in size
   D. All A., B. & C.

2. Coking time in beehive coke oven is about ___________________?

   A. 12 hours
   B. 2-3 days
   C. One week
   D. Two weeks

3. Beehive coke oven________________?

   A. Facilitates by-products recovery
   B. Takes 2-3 days for coking of coal but requires no external fuel for heating
   C. Gives larger yield of coke (around 85%) as compared to by-product ovens
   D. Produces coke with very poor strength

4. Coke ovens in steel plant are heated by ___________________?

   A. Electricity
   B. Coke oven gas
   C. Mixed gas
   D. Both B. & C.

5. Narrow coke ovens as compared to wider coke ovens_________________?

   A. Produce smaller coke
   B. Produce stronger coke
   C. Require less time of carbonisation
   D. All A., B. and C.

6. Compound coke ovens are those which can be heated by __________________?

   A. Both steam and electrical power
   B. Lean gas (e.g., B.F. gas)
   C. Rich gas (e.g., coke oven gas)
   D. Both B. and C.

7. Undercharging of coal in the by-product coke ovens results in ____________________?

   A. Decrease in the c.v. of coke oven gas
   B. Increase in its throughput
   C. Increase in the c.v. of coke oven gas
   D. No change in the c.v. of coke oven gas

8. Coking time in narrow by-product coke ovens is around ______________ hours?

   A. 18
   B. 48
   C. 8
   D. 80

9. Heat penetration rate in narrow coke ovens in high temperature carbonisation of coal is around ______________ cm/hr?

   A. 2.5
   B. 0.5
   C. 10
   D. 20

10. Flue gas from the heating chamber of by product coke ovens is removed by________________?

    A. Forced draft fan
    B. Induced draft fan
    C. Steam ejector
    D. Natural draft