Screen efficiency is______________________?
Screen efficiency is______________________?
A. Recovery/rejection
B. Recovery
C. Rejection
D. None of these
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The study on washability of coal is done by using the _____________ technique?
The study on washability of coal is done by using the _____________ technique?A. Tabling
B. Elutriation
C. Heavy media separation
D. None of theseFroth floatation is the most suitable for treating ____________________?
Froth floatation is the most suitable for treating ____________________?A. Iron ores
B. Sulphide ores
C. Quartzite
D. None of theseSize reduction of _____________ is accomplished in steam heated rollers and roll crushers?
Size reduction of _____________ is accomplished in steam heated rollers and roll crushers?A. Resins
B. Gums
C. Hard rubber
D. WaxesOut of the following size reduction equipments, the maximum feed size can be accepted by the__________________?
Out of the following size reduction equipments, the maximum feed size can be accepted by the__________________?A. Tube mill
B. Ball mill
C. Jaw crusher
D. Jet pulveriserA sand mixture was screened through a standard 10-mesh screen. The mass fraction of the oversize material in feed, overflow and underflow were found to be 0.38, 0.79 and 0.22 respectively. The screen effectiveness based on the oversize is_________________?
A sand mixture was screened through a standard 10-mesh screen. The mass fraction of the oversize material in feed, overflow and underflow were found to be 0.38, 0.79 and 0.22 respectively. The screen effectiveness based on the oversize is_________________?A. 0.50
B. 0.58
C. 0.68
D. 0.62The most suitable equipment for removing the fine dust particle (< 1 micron dia.) from air below its dew point will be a/an______________?
The most suitable equipment for removing the fine dust particle (< 1 micron dia.) from air below its dew point will be a/an______________?A. Bag filter
B. Electrostatic precipitator
C. Cyclone separator
D. Wet scrubber