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Chemical Engineering - Mechanical Operations

Exercise : Mechanical Operations - Section 2
31.
Maximum size reduction in a ball mill is done by the, __________ action.
attrition
compression
impact
cutting
Answer: Option
Explanation:
No answer description is available. Let's discuss.
32.
increasing the capacity of a screen __________ the screen effectiveness.
decreases.
increases
does not effect
none of these
Answer: Option
Explanation:
No answer description is available. Let's discuss.
33.
The power number for a stirred tank becomes constant at high Reynolds number. In this limit, the variation of power input with impeller rotational speed (N) is proportional to
N°
N1
N2
N3
Answer: Option
Explanation:
No answer description is available. Let's discuss.
34.
Bond crushing law
calls for relatively less energy for the smaller product particles, than does the Rittinger law.
is less realistic in estimating the power requirements of commercial crushers.
states that the work required to form particle of any size from very large feed is proportional to the square root of the volume to surface ratio of the product.
states that the work required for the crushing is proportional to the new surface created.
Answer: Option
Explanation:
No answer description is available. Let's discuss.
35.
Flow of filtrate through the cake in a plate and frame filter press is best described by the __________ equation.
Kozney-Karman
Hagen-Poiseulle's
Fanning's
Kremser
Answer: Option
Explanation:
No answer description is available. Let's discuss.
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