Mechanical Operations Mcqs for Chemical


Q.  The capacity of a belt conveyor depends upon two factors. If one is the cross-section of the load, the other is the _____________ of the belt?

a. Speed
b. Thickness
c. Length
d. None of these


ANSWER: See Answer
 
No explanation is available for this question!
MCQs:  _______________ mill is not used for grinding wheat into flour and for milling of cereals & other ? vegetable products.
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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________________?
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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 ?
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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_______________?
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MCQs:  Wet sieving is employed, when the product contains ________________ materials?
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MCQs:  Size reduction mechanism used in Jaw crushers is__________________?
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MCQs:  Solid particles separation based on the difference in their flow velocities through fluids is termed as the__________________?
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MCQs:  The mechanism of size reduction by a hammer mill is by impact and attrition between the________________?
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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__________________?
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MCQs:  During size reduction by a jaw crusher, the energy consumed decreases with the__________________?
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MCQs:  Out of the following size reduction equipments, the maximum feed size can be accepted by the__________________?
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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)_________________?
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MCQs:  For a turbine agitated and baffled tank, operating at low Reynold’s number (based on impeller diameter), the power number (Np) varies with NRe as_________________?
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MCQs:  Short distance transportation of grain, gravel, sand, ash, asphalt etc. is done by using a ______________ conveyor?
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MCQs:  Screen efficiency is______________________?
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MCQs:  In case of a hammer crusher ?
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MCQs:  To remove very small amount of tiny solid impurities from liquid, we use a_____________________?
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MCQs:  _____________________ baffles are provided in ball mills ?
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MCQs:  Crushing efficiency of a machine ranges between __________________ percent?
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MCQs:  Rod mills employed for grinding_________________?
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