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MCQs: The basic filtration equation is given as dt/dV = (μ/A ΔP). [(α .CV/A) + Rm], where, V is volume of the filtrate; A is the filtration area, a is specific cake resistance, μ is viscosity of the filtrate, and C is the concentration of the solids in the feed slurry. In a 20 minutes constant rate filtration, 5 m3 of filtrate was obtained. If this is followed by a constant pressure filtration, how much more time in minutes, it will take for another 5 m3 of filtrate to be produced? Neglect filter medium resistance, Rm; assume incompressible cake ?
Category: Chemical Engineering Mcqs, Published by: teswesm
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MCQs: A centrifugal filtration unit operating at a rotational speed of w has inner surface of the liquid (density ρL) located at a radial distance R from the axis of rotation. The thickness of the liquid film is δ and no cake is formed. The initial pressure drop during filtration is ___________________?
Category: Chemical Engineering Mcqs, Published by: teswesm
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MCQs: Equivalent diameter of a particle is the diameter of the sphere having the same __________________?
Category: Chemical Engineering Mcqs, Published by: teswesm
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MCQs: Which of the following is not accomplished by agitation of liquids in agitators ?
Category: Chemical Engineering Mcqs, Published by: teswesm
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MCQs: _____________ is the most commonly used ‘filter aid’?
Category: Chemical Engineering Mcqs, Published by: teswesm
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MCQs: For grinding of cereals, grains, spices, pigments, saw dust, cork etc., the most extensively used size reduction equipment is a__________________?
Category: Chemical Engineering Mcqs, Published by: teswesm
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MCQs: For the preliminary breaking of hard rock, we use a____________________?
Category: Chemical Engineering Mcqs, Published by: teswesm
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MCQs: Jigging is a technique by which different particles can be____________________?
Category: Chemical Engineering Mcqs, Published by: teswesm
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MCQs: _______________ mill is not used for grinding wheat into flour and for milling of cereals & other ?
vegetable products.
Category: Chemical Engineering Mcqs, Published by: teswesm
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MCQs: The energy required per unit mass to grind limestone particles of very large size to 100 μm is 12.7 kWh/ton. An estimate (using Bond’s law) of the energy to grind the particles from a very large size to 50 μm is________________?
Category: Chemical Engineering Mcqs, Published by: teswesm
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MCQs: What is the critical rotation speed in revolutions per second, for a ball mill of 1.2 m diameter charged with 70 mm dia balls ?
Category: Chemical Engineering Mcqs, Published by: teswesm
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MCQs: According to Taggart’s rule for selecting between a gyratory crusher and a jaw crusher; the later should be used, if the hourly tonnage to be crushed divided by the square of the gape expressed in cm is less than_______________?
Category: Chemical Engineering Mcqs, Published by: teswesm
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MCQs: Wet sieving is employed, when the product contains ________________ materials?
Category: Chemical Engineering Mcqs, Published by: teswesm
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MCQs: Size reduction mechanism used in Jaw crushers is__________________?
Category: Chemical Engineering Mcqs, Published by: teswesm
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MCQs: Solid particles separation based on the difference in their flow velocities through fluids is termed as the__________________?
Category: Chemical Engineering Mcqs, Published by: teswesm
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MCQs: The mechanism of size reduction by a hammer mill is by impact and attrition between the________________?
Category: Chemical Engineering Mcqs, Published by: teswesm
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MCQs: Pebble mills are tumbling mills widely used for grinding in the manufacture of paints & pigments and cosmetic industries, where iron contamination in the product is highly objectionable. Pebbles used in pebble mill are made of__________________?
Category: Chemical Engineering Mcqs, Published by: teswesm
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MCQs: During size reduction by a jaw crusher, the energy consumed decreases with the__________________?
Category: Chemical Engineering Mcqs, Published by: teswesm
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MCQs: Out of the following size reduction equipments, the maximum feed size can be accepted by the__________________?
Category: Chemical Engineering Mcqs, Published by: teswesm
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MCQs: The capacity of a classifier in ‘tons of solid/hr’ is given by (where, A = cross-sectional area in m2, V = rising velocity of fluid in m/sec, S = percentage of solids in the suspension by volume, ρ = density of solids in kg/m3)_________________?
Category: Chemical Engineering Mcqs, Published by: teswesm
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