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.
Related Mcqs:
- 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. - Coke ovens in steel plant are heated by ___________________?
A. Electricity
B. Coke oven gas
C. Mixed gas
D. Both B. & C. - 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. - Preheating of coal charge for the coke ovens reduces the __________________?
A. Time of carbonisation
B. Yield of gas and tar
C. Fuel consumption in coking
D. All A., B. and C. - 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 - Coking time in narrow by-product coke ovens is around ______________ hours?
A. 18
B. 48
C. 8
D. 80 - 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 - 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 - Width of the coke oven towards coke side is slightly more than that on pusher side to____________________?
A. Facilitate easy discharging of coke as it swells during carbonisation
B. Facilitate uniform heating of the oven
C. Increase the output of the coke
D. None of these - Degree of carbonisation of coal during coke making can be roughly judged by the ______________ of the coke produced?
A. Colour
B. Moisture content
C. Ash content
D. Volatile matter
