91. Pick out the material having minimum Rittinger's number.
92. Agglomeration of individual particles into clusters (flocs) is called flocculation. To prevent flocculation, the most commonly used dispersing agents are
93. Which of the following mineral dressing operations is termed as 'comminution'?
94. Cumulative analysis for determining surface is more precise than differential analysis, because of the
95. Screen capacity is proportional to (where, S = screen aperture)
96. Rod mills employed for grinding
97. Ultra centrifuges are used for the separation of __________ solid particles.
98. Feed size of ≥ 25 cms can be accepted by
99. The unit of filter medium resistance is
100. A suspension of glass beads in ethylene glycol has a hindered settling velocity of 1.7 mm/s, while the terminal settling velocity of a single glass bead in ethylene glycol is 17 mm/s. If the Richardson-Zaki hindered settling index is 4.5, the volume fraction of solids in the suspension is
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