Process Equipment and Plant Design

Smaller sized packings are generally dumped to the packed columns, and the large ones of size greater than ______________ mm are stacked individually, which provides better control over bed porosity and offers lower gas pressure drop?

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Smaller sized packings are generally dumped to the packed columns, and the large ones of size greater than ______________ mm are stacked individually, which provides better control over bed porosity and offers lower gas pressure drop?

A. 25
B. 50
C. 75
D. 150

Triangular pitch tube layout as compared to square pitch in a shell and tube heat exchanger________________?

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Triangular pitch tube layout as compared to square pitch in a shell and tube heat exchanger________________?

A. Permits the use of less tubes in a given shell diameter
B. Facilitates comparatively easier external cleaning because of large clearance
C. Permits the use of more tubes in a given shell diameter
D. Both B. and C.

To keep the power input constant for a stirred vessel operating under fully developed turbulent flow conditions (constant power number), if the impeller diameter is increased by 20%, the impeller speed should be decreased by a factor of_________________?

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To keep the power input constant for a stirred vessel operating under fully developed turbulent flow conditions (constant power number), if the impeller diameter is increased by 20%, the impeller speed should be decreased by a factor of_________________?

A. (1.2)3/2
B. (1.2)3/5
C. (1.2)2/3
D. (1.2)5/3