MCQs: Which of the following is not used as a surface active agent in a flocculation operation ?
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MCQs: Work index is the gross energy (kWh/tonne of feed) necessary to reduce a very large feed to such a size that 80% of product particles will pass through a 0.1 mm screen. The value of work index determined for wet grinding should be multiplied with ______________ to get the same for dry grinding?
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MCQs: A straight line is obtained on plotting reciprocal of filtration rate vs. the volume of filtrate for _______________ flow of filtrate?
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MCQs: Sphericity for a non-spherical particle is given by (where, V and S are volume and surface area respectively of one particle. and, D = equivalent diameter of particle)?
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MCQs: Bond crushing law_________________?
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MCQs: Filtration capacity of a rotary drum vacuum filter depends upon the_______________?
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MCQs: The specific cake resistance for incompressible sludges is (where ΔP = pressure drop over cake)__________________?
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MCQs: Which of the following is the most suitable filter for separation of abrasive solids suspended in a corrosive liquid ?
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MCQs: A fluid energy mill is used for_________________?
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MCQs: Which of the following is a vacuum filter ?
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MCQs: Carbon black is pulverised in a_______________?
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MCQs: Rittinger’s number designates the new surface created per unit mechanical energy absorbed by the material being crushed. Larger value of Rittinger’s number of a material indicates its________________?
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MCQs: For efficient grinding, ball mills must be operated__________________?
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MCQs: For a sphere falling in the constant drag co-efficient regime, its terminal velocity depends on its diameter D. as_________________?
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MCQs: What is the reduction ratio in a fine crushing operation having following feed and product sizes ?
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MCQs: _____________ is the most suitable for compounding rubber and plastic solids ?
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MCQs: During filtration operation, the filtrate encounters the resistance of the ___________________?
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MCQs: Rittinger number which designates the new surface produced per unit of mechanical energy absorbed by the material being crushed, depends on the ______________________?
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MCQs: Size measurement of ultrafine particles can be best expressed in terms of___________________?
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MCQs: Which of the following achieves the least reduction ratio for a given feed size ?
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