Chemical Engineering - Process Equipment and Plant Design

21. 

Where does the maximum tensile strength occur in a thick cylindrical vessel subjected to internal pressure ?

A. At the inner surface.
B. At the mid thickness of the cylindrical wall.
C. At the outer surface.
D. None of these.

Answer: Option A

Explanation:

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22. 

It is not desirable to design a heat exchanger for LMTD correction factor, FT, of less than

A. 0.99
B. 0.95
C. 0.80
D. 0.55

Answer: Option C

Explanation:

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23. 

A rivetted joint does not fail by __________ of rivets.

A. tearing
B. shearing
C. tearing of the plate across a row
D. none of these

Answer: Option D

Explanation:

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24. 

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).

Answer: Option C

Explanation:

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25. 

Bracket supports are the most suitable for supporting __________ vessels.

A. thick walled vertical
B. horizontal
C. thin shperical (e.g. Horton sphere)
D. none of these

Answer: Option A

Explanation:

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