A. Tabling
B. Elutriation
C. Heavy media separation
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 - 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 - Sizing of very fine particles of the order of 5 to 10 microns is done by elutriation, which is a _____________ operation?
A. Clarification
B. Sedimentation
C. Flocculation
D. Classification - Sphericity of pulverised coal is__________________?
A. 1
B. < 1
C. > 1
D. ∞ - Float and sink test determines the possibility of cleaning of coal by a process based on the___________________?
A. Gravity separation
B. Wettability
C. Particle shape
D. None of these - 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 - 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 - Pulverised coal passing through 200 mesh screen has a diameter of 0.074 mm (74 micron). The same passing through 50 mesh screen will have a dia of ____________ mm?
A. 0.007
B. 0.30
C. 50
D. 0.014 - Which of the following gives the work required for size reduction of coal to -200 mesh in a ball mill most accurately?
A. Rittinger’s law
B. Kick’s law
C. Bond’s law
D. None of these - 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
