Chemical Engineering - Process Equipment and Plant Design

31. 

In chemical process equipments, the conical bottom heads used, usually has an apex angle of

A. 20°
B. 40°
C. 60°
D. 80°

Answer: Option C

Explanation:

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32. 

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

Answer: Option C

Explanation:

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33. 

Shell side heat transfer co-efficient in case of square pitch as compared to the triangular pitch under similar condition of fluid flow and tube size is

A. more
B. same
C. less
D. twice

Answer: Option C

Explanation:

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34. 

Correct use of 'factor of safety' is very important in equipment design. It is defined as the ratio of the

A. ultimate stress to breaking stress.
B. ultimate stress to working stress.
C. working stress to ultimate stress.
D. none of these.

Answer: Option B

Explanation:

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35. 

The operating velocity in the absorption tower is usually 40-50% of the flooding velocity. Packed absorption towers are normally designed for a pressure drop of about __________ mm of water column per metre height of packing.

A. 1-5
B. 20-40
C. 100-150
D. 1000-1500

Answer: Option B

Explanation:

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