A. Caking index
B. Mineral matter content
C. Ash content
D. Both B. and C.
Related Mcqs:
- Calorific value of coal middling generated in coal washeries during washing of coal may be around _____________ Kcal/kg?
A. 1000
B. 4000
C. 6000
D. 8000 - The liquid used for the washing of coal in an industrial coal washery is a mixture of water and ____________________?
A. Carbon tetrachloride
B. Sand (40%)
C. Mineral oil of high viscosity & specific gravity (1.6)
D. None of these - Improper storage condition results in the weathering of coal and spontaneous combustion, which increases its_________________?
A. Caking index
B. Yield of carbonised products
C. Friability & oxygen content
D. Calorific value - Washing of coal _________________?
A. Reduces its ash & sulphur content
B. Improves its coking properties
C. Increase the fusion point of its ash by removing chlorine compounds
D. All A., B. and C. - Washing of coal does not reduce its______________________?
A. S & P content
B. Heating value
C. Fusion point of ash
D. None of these - Washing of coal is done to reduce the_________________?
A. Inherent impurities
B. Adhering impurities
C. Mineral matter
D. Both B. and C. - With increase in the oxygen content of the coal, its ______________ decreases?
A. Calorific value
B. Caking power
C. Both A. & B.
D. Neither A. nor B. - A coal containing very high percentage of durain is called ______________ coal?
A. Bright
B. Splint
C. Non-banded
D. Boghead - Yield of coke oven gas in low temperature carbonisation of coal is about ______________ Nm3 /ton of dry coal?
A. 60
B. 160
C. 500
D. 750 - Commercial production of petrol from coal (as practised in a factory at Sasol in South Africa) is done by the ________________ of coal?
A. Hydrogenation
B. Gasification
C. Carbonisation
D. None of these
