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Chemical Engineering - Mechanical Operations

Exercise : Mechanical Operations - Section 9
26.
A __________ employs a set of screen across a flow channel for the separation of dirt/rust from a flowing liquid stream.
thickener
classifier
strainer
clarifier
Answer: Option
Explanation:
No answer description is available. Let's discuss.
27.
Separation of a suspension or slurry into a supernatant clear liquid (free from particles) and a thick sludge containing a high concentration of solid is called
classification
sedimentation
clarification
decantation
Answer: Option
Explanation:
No answer description is available. Let's discuss.
28.
Reciprocal of sphericity is termed as the
specific surface ratio
shape factor
sauter diameter
surface area per unit mass
Answer: Option
Explanation:
No answer description is available. Let's discuss.
29.
With increase in the pressure drop across the cake, the specific cake resistance for the compressible sludge
increases
decreases
remains constant
increases linearly
Answer: Option
Explanation:
No answer description is available. Let's discuss.
30.
Pick out the wrong statement.
Hammer crushers operate by impact action.
Standard screens have circular opening.
With increase in mesh number of screens, their diameter in microns decreases.
200 mesh screen has 200 openings per linear cm.
Answer: Option
Explanation:
No answer description is available. Let's discuss.
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