Mechanical Operations Mcqs for Chemical


Q.  Pick out the wrong statement ?

a. More commonly used jaw crusher between Dodge jaw crusher and Blake jaw crusher is the later one
b. There are only four methods namely compression, impact, attrition and cutting, which the size reduction equipments employ
c. Cutting machines mainly employ ‘attrition’ for size reduction of solids
d. Operating principles of Dodge and Blake jaw crushers are combined in the working of universal jaw crushers


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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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MCQs:  As particle size is reduced__________________?
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MCQs:  Reciprocal of sphericity is termed as the________________?
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MCQs:  Filtration of water in a paper mill is done by a/an _______________ filter?
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MCQs:  With increase in the capacity of screens, the screen effectiveness__________________?
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MCQs:  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) ?
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MCQs:  To get a fine talc powder from its granules, the equipment used is____________________?
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MCQs:  The controlling resistance in a rotary drum vacuum filter is the ________________ resistance?
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MCQs:  Separation of particles of various sizes, shapes and densities by allowing them to settle in a fluid is called__________________?
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MCQs:  Theoretical capacity of crushing rolls in tons/hr is given by (where, V = peripheral velocity, m/sec. W = width of rolls, m Dr = distance between rolls ρ = density of material to be crushed, kg/m3 here, V =πND where, N = speed of the rolls in rotation per second (rps) D = diameter of rolls, m) ?
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MCQs:  In a size reduction crushing operation, the feed size is 10 to 50 mm, while the product size is 2 to 10 mm. This is a case of _______________ crushing?
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