Chemical Engineering MCQs

6108 MCQs  (Page 239 of 611)

Attempt Chemical Engineering Quiz
The ratio of the actual mesh dimension of Taylor series to that of the next smaller screen is_______________?
A. 2
B. √2
C. 1.5
D. √3
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The energy consumed by a ball mill depends on__________________?
A. Its speed
B. Its ball load
C. The density of the material being ground
D. All a., b. and c.
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Size reduction of asbestos and mica is done by____________________?
A. Hammer mills
B. Rod mills
C. Gyratory crushers
D. Crushing rolls
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In case of a hammer crusher, the final product size depends on the____________________?
A. Feed rate
B. Rotor speed
C. Clearance between hammer & grinding plates
D. All a., b. and c.
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Tube mill compared to ball mill_______________________?
A. Produces finer products
B. Is long in comparison with its diameter
C. Uses smaller balls
D. All a., b. & c.
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Tabling process used for separating two materials of different densities by passing the dilute pulp over a table/deck, which is inclined from the horizontal surface at an angle of about________________?
A. 1 to 2°
B. 2 to 5°
C. 5 to 10°
D. 10 to 15°
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To get ultrafine particles, the equipment used is a _________________?
A. Ball mill
B. Rod mill
C. Hammer crusher
D. Fluid energy mill
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Kick’s law assumes that the energy required for size reduction is proportional to the logarithm of the ratio between the initial and the final diameters. The unit of Kick’s constant is_________________?
A. Kw. sec/kg
B. Kwh/kg
C. Kwh/sec. kg
D. Kg/sec
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Filtration rate through a filter cake is proportional to (where, S = filtering surface R = specific cake resistance μ = viscosity of the filtrate) ?
A. S
B. 1/r
C. 1/μ
D. All a., b. & c.
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In continuous filtration (at a constant pressure drop), filtrate flow rate varies inversely as the__________________?
A. Square root of the velocity
B. Square of the viscosity
C. Filtration time only
D. Washing time only
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Word of the Day
27 Jul
Widen
make or become wider.
چوڑا ہونا، کشادہ کرنے کا عمل

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