91. Which of the following is not used as a surface active agent in a flocculation operation?
92. Gravity settling process is not involved in the working of a
93. Reciprocating screens are normally inclined at an angle of 5° with the horizontal and employ gyratory motion at feed end & reciprocating motion at the discharge end. They are not suitable for the screening of the
94. Size reduction of ice and gypsum can be accomplished suitably by a __________ crusher.
95. Which of the following conveyors cannot be recommended for transportation of abrasive materials?
96. Size reduction of __________ is accomplished in steam heated rollers and roll crushers.
97. As per Taggart's formula, the capacity (kg/hr) of Jaw & Gyratory crushers (for gapes of 10 to 60 cms) is equal to (where, L = Length of feed opening, cms S = Maximum width of discharge opening, cms)
98. Activators are those chemicals which help buoying up one mineral in preference to the other in the froth floatation process. Which of the following is an activator?
99. The most common filter aid is
100. Froth floatation is the most suitable for treating
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