Chemical Engineering - Mechanical Operations

46. 

Jigging is a technique by which different particles can be

A. separated by particle size.
B. separated by particle density.
C. separated by particle shape.
D. mixed.

Answer: Option A

Explanation:

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47. 

Crushing of mineral particles is accomplished in a 'cage mill', when one or more alloy steel bars are revolved in opposite directions. It is a type of __________ mill.

A. impact
B. roll
C. vibratory
D. none of these

Answer: Option A

Explanation:

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48. 

Balls for ball mills are never made of

A. forged/cast steel
B. lead
C. cast iron
D. alloy steel

Answer: Option B

Explanation:

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49. 

200 mesh screen means 200 openings per

A. cm2
B. cm
C. inch
D. inch2

Answer: Option C

Explanation:

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50. 

__________ is the most commonly used 'filter aid'.

A. Diatomaceous earth
B. Fuller's earth
C. Vermiculite
D. Semi-plastic clay

Answer: Option A

Explanation:

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