A. Gravity separation
B. Wettability
C. Particle shape
D. None of these
Related Mcqs:
- Washability curve based on float and sink test enables an assessment to be made of the possibility of cleaning a coal fraction based on the____________________?
A. Density separation
B. Differential wettability
C. Size
D. Volatile matter content - Which of the following is the most suitable for cleaning of fine coal dust (<0.5 mm) ?
A. Trough washer
B. Baum jig washer
C. Spiral separator
D. Froth floatation - A cottrell precipitator makes use of the ______________ for dusty air cleaning?
A. Electric spark
B. Corona discharge
C. Alternating current
D. None of these - In coal washeries, three products namely the valuable product (i.e. clean/washed coal), discarded product (i.e. mineral matter) and an additional concentrated product called _____________ is produced?
A. Concentrate
B. Tailing
C. Middling
D. None of these - Separation of solid suspended in liquid into a supernatant clear liquid and a denser slurry employs a process termed as the___________________?
A. Coagulation
B. Flocculation
C. Sedimentation
D. Clarification - The process opposite to ‘dispersion’ is termed as the___________________?
A. Flocculation
B. Sedimentation
C. Filtration
D. None of these - A screen is said to be blinded, when the___________________?
A. Over-sizes are present in undersize fraction
B. Under-sizes are retained in oversize fraction
C. Screen is plugged with solid particles
D. Screen capacity is abruptly increased - Reduction ratio of crushers is the___________________?
A. Ratio of feed opening to discharge opening
B. Ratio of discharge opening to feed opening
C. Determining factor for minimum dia of the feed and the product
D. None of these - Run of mine (ROM) coal is crushed by a _________________________ for use in domestic ovens?
A. Jaw crusher
B. Hammer crusher
C. Ball mill
D. Tube mill - Coal is finally pulverised to 200 mesh size for burning in boilers by a___________________?
A. Hammer crusher
B. Ball mill
C. Roll crusher
D. Gyratory crusher
