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Chemical Engineering - Process Equipment and Plant Design

Exercise : Process Equipment and Plant Design - Section 2
36.
Generally, elliptical dished heads
are manufactured on 2:1 ratio of major to minor axis and is recommended to be used for pressure vessels operating above a pressure of 1.5 MN/m2 .
resist half the pressure rating compared to hemi spherical head provided on the cylindrical shell of the same thickness and diameter.
are approximately as strong as seamless cylindrical shell having the corresponding I.D and O.D.
all (a), (b) and (c)
Answer: Option
Explanation:
No answer description is available. Let's discuss.
37.
Pick out the wrong statement pertaining to the comparative evaluation of performance of the packed tower and the plate tower.
Plate tower is perferred, if interstage cooling is required to remove heats of reaction or solution.
Plate tower is preferred over packed tower, if the operation involves liquids containing dispersed solids.
The total weight of a dry plate tower is usually much more than that of a dry packed tower designed for the same duty.
In operations involving large temperature changes. (e.g. distillation), plate towers are preferred over packed towers as the packing may be crushed due to large temperature changes.
Answer: Option
Explanation:
No answer description is available. Let's discuss.
38.
The circumferential (hoop) stress in a thin walled cylinderical vessel under internal pressure is
pd/2t
pd/4t
pd/t
pd/3t
Answer: Option
Explanation:
No answer description is available. Let's discuss.
39.
for fully open gate valves would be
much more than that for fully open globe valves.
much less (say 2% than that for fully open globe valves).
around 7.
both (b) and (c).
Answer: Option
Explanation:
No answer description is available. Let's discuss.
40.
LMTD correction factor is used in heat exchanger design for
double pipe heat exchanger.
multipass shell and tube heat exchanger.
fouling fluids.
counter flow of hot and cold fluids.
Answer: Option
Explanation:
No answer description is available. Let's discuss.
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