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Process Equipment and Plant Design

Process Equipment and Plant Design
A shell may by termed as thin if its thickness to diameter ratio is less than 0.1. The factor which can be neglected in the calculation of membrane stresses is

Deformation
Shear
Elongation
Bending

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Process Equipment and Plant Design
In case of saddle packing (e.g., berl and intralox saddles), the maximum size of the packing should not exceed __________ of the column diameter.

l/5th
l/15th
l/50th
l/30th

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Process Equipment and Plant Design
Lug support is

The most suitable for thick vertical vessel
All of these
Provided usually for vessels of much smaller height than skirt supported vessels
Same as bracket support

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Process Equipment and Plant Design
With increase in the reflux ratio for a fixed production from a continuous binary distillation column, the __________ decreases.

Fixed charges initially
Running cost of steam for reboiler
Running cost of cooling water for condenser
Vapour & liquid load both

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Process Equipment and Plant Design
Which of the following efficiencies can be greater than 100%?

Point efficiency
Murphree plate efficiency
None of these
Overall plate efficiency

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Process Equipment and Plant Design
Le/D for 90° elbow (medium radius) and 90°square elbow would be respectively around

3 and 5
25 and 60
250 and 600
100 and 250

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