A. Lower bulk density
B. Lower strength
C. Higher reactivity
D. All A., B. and C.
Related Mcqs:
- Higher percentage of ash in coal meant for the production of metallurgical grade coke ___________________?
A. Decreases the hardness of coke
B. Decreases the abrasion resistance of coke
C. Causes brittleness in steel
D. None of these - 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. - 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 - 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. - 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 - During coal carbonisation process, the conversion of semi-coke to coke is accompanied by an increase in the _______________ of the mass?
A. Density
B. Porosity
C. Electrical resistivity
D. None of these - Ash content in the coke produced from a coking coal having 20% ash may be around _____________ percent?
A. 6
B. 12
C. 18
D. 24 - Percentage of hydrogen in coke oven gas may be around ___________________?
A. 10
B. 25
C. 45
D. 60 - Soft coke is not ___________________?
A. Produced by low temperature carbonisation of coal
B. A domestic fuel
C. Used in blast furnaces
D. None of these - Coke ovens in steel plant are heated by ___________________?
A. Electricity
B. Coke oven gas
C. Mixed gas
D. Both B. & C.
