Mechanical Operations MCQ Questions & Answers | Chemical Engineering Page-1 section-6

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1.
During agitation of liquids, the

A. Froude number is independent for the curves between power number and Reynolds number in baffled system

B. Power number becomes independent of impellers Reynolds number at high Reynolds number, but is dependent on the geometry of the impeller

C. Froude number is used to account for the effect of surface (e.g., the centre vortex) on the power number

D. All of the above

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2.
Filter aids like asbestos, kieselguhr, diatomaceous earth etc. are used to increase the porosity of the final filter cake & reducing the cake resistance during filtration. Filter aid is

A. Added to the feed slurry

B. Precoated on the filter medium prior to filtration

C. Separated from the cake by dissolving solids or by burning it off

D. All of the above

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3.
According to Bond crushing law, the work required to form particle of size 'D' from very large feed is (where (S/V)_p and (S/V)_f are surface to volume ratio of the product and feed respectively).

A. (S/V)_p

B. √(S/V)_p

C. (S/V)²_p

D. (S/V)_f

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4.
Angle of nip of the crushing rolls does not depend upon the

A. Diameter of the rolls

B. Speed of the rolls

C. Product size

D. Feed size

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5.
The distribution given by microscopic analysis of powder is

A. Number

B. Length

C. Area

D. Volume

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Mechanical Operations MCQ Questions & Answers | Chemical Engineering

1. During agitation of liquids, the

Answer & Solution

2. Filter aids like asbestos, kieselguhr, diatomaceous earth etc. are used to increase the porosity of the final filter cake & reducing the cake resistance during filtration. Filter aid is

Answer & Solution

3. According to Bond crushing law, the work required to form particle of size 'D' from very large feed is (where (S/V)p and (S/V)f are surface to volume ratio of the product and feed respectively).

Answer & Solution

4. Angle of nip of the crushing rolls does not depend upon the

Answer & Solution

5. The distribution given by microscopic analysis of powder is

Answer & Solution

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1.
During agitation of liquids, the

2.
Filter aids like asbestos, kieselguhr, diatomaceous earth etc. are used to increase the porosity of the final filter cake & reducing the cake resistance during filtration. Filter aid is

3.
According to Bond crushing law, the work required to form particle of size 'D' from very large feed is (where (S/V)_p and (S/V)_f are surface to volume ratio of the product and feed respectively).

4.
Angle of nip of the crushing rolls does not depend upon the

5.
The distribution given by microscopic analysis of powder is