Chemical Engineering - Mechanical Operations

26. 

Size reduction of __________ is accomplished in steam heated rollers and roll crushers.

A. resins
B. gums
C. hard rubber
D. waxes

Answer: Option C

Explanation:

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27. 

The capacity of a belt conveyor depends upon two factors. If one is the cross-section of the load, the other is the __________ of the belt.

A. speed
B. thickness
C. length
D. none of these

Answer: Option A

Explanation:

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28. 

Which of the following is not a part of the Blake jaw crusher?

A. Hanger
B. Check plates
C. Toggles
D. Pitman

Answer: Option A

Explanation:

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29. 

If a force greater than that of gravity is used to separate solids & fluids of different densities, the process is termed as the

A. sedimentation
B. flocculation
C. dispersion
D. centrifugation

Answer: Option D

Explanation:

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30. 

Filter aid is used to

A. increase the rate of filtration.
B. decrease the pressure drop.
C. increase the porosity of the cake.
D. act as a support base for the septum.

Answer: Option C

Explanation:

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