A. Produce weak coke
B. Produce strong coke
C. May damage the coke oven walls during carbonisation
D. Both B. and C.
Related Mcqs:
- Caking index of a coal is a measure of its _______________________?
A. Abradability
B. Reactivity
C. Agglutinating (binding) properties
D. Porosity - Caking index of the coal blend used for the manufacture of metallurgical coke should be around__________________?
A. 5
B. 21
C. 40
D. 48 - Caking coal is desirable for_________________?
A. Burning on travelling grate
B. Coke making
C. Burning on firebars
D. All A., B. and C. - Caking index of coal blend used for blast furnace coke making is about_________________?
A. 8
B. 12
C. 22
D. 36 - Highly reactive coke have lower ___________________?
A. Porosity
B. Coke reactivity index (CRI)
C. Critical air blast (CAB) value
D. Both B. and C. - Lignite is ___________________?
A. A high rank coal
B. A coking coal
C. Can be used for gasification and steam generation
D. A black banded coal which burns with a non-smoky yellowish flame - C.V. (kcal/Nm3) of gaseous fuels _____________ with increase in molecular weight?
A. Decreases
B. Increases
C. Remain constant
D. May increase or decrease, depends on combustibles - Assam (India) coals suffers mainly from the disadvantage of high ______________ content?
A. Ash
B. Volatile matter
C. Sulphur (4-6%)
D. Moisture - If the specific heat of gaseous products of combustion of a fuel is high, the abiabatic flame temperature will be_____________?
A. Low
B. High
C. Very high, if the fuel is of low calorific value
D. None of these - About _____________ Nm3 of air will be required for the complete combustion of 2Nm3 of CO?
A. 2
B. 3
C. 4
D. 5
