Chemical Engineering - Mechanical Operations

6. 

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.

Answer: Option A

Explanation:

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7. 

For sizing of fine materials, the most suitable equipment is a

A. trommel
B. grizzly
C. shaking screen
D. vibrating screen

Answer: Option D

Explanation:

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8. 

Which of the following is not categorised as a "mechanical operation" ?

A. Agitation
B. Filtration
C. Size enlargement
D. Humidification

Answer: Option D

Explanation:

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9. 

Which of the following is a pressure filter ?

A. Leaf filter (Moore filter).
B. Plate and flame filter.
C. Rotary drum filter.
D. Sand filter.

Answer: Option B

Explanation:

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10. 

Tabular bowl centrifuges as compared to disk bowl centrifuges

A. operate at higher speed.
B. employ bowl of larger diameter.
C. can not be operated under pressure/vacuum.
D. can't be used for separation of fine suspended solids from a liquid.

Answer: Option A

Explanation:

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