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
Related Mcqs:
- Ignition temperature decreases progressively from anthracite to lignite, because___________________?
A. Volatile matter content increases
B. Carbon content decreases
C. Moisture content increases
D. Ash content increases - L.D. converter gas (produced in steel plant) comprises mainly of ___________________?
A. CO (upto 65%) & CO2
B. CO2 & H2
C. CO & O2
D. CO2 & O2 - Desirable “Micum Index” values of metallurgical coke are ___________________?
A. M40 > 78% and M10 < 10%
B. M40 > 4% and M10 10% and M10 98% and M10 < 2% - Number of macrocomponents present in coal according to Stopes are ___________________?
A. Four
B. Five
C. Six
D. Two - ‘Fat’ coal means a coal having ___________________?
A. Low calorific value
B. High volatile matter
C. Low ash content
D. Non smoking tendency - 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 - Coalification means the ___________________?
A. Process of conversion of lignite into anthracite
B. Underground gasification of coal
C. Complete combustion of coal
D. Direct hydrogenation of coal - Grindability index of a coal is 100. It implies that the ___________________?
A. Coal can be pulverised with great difficulty
B. Coal can’t be pulverised
C. Coal can be easily pulverised
D. Power consumption in grinding the coal will be very high - 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
