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Process Equipment and Plant Design

Process Equipment and Plant Design
Equivalent diameter for heat transfer calculation for a duct of square cross-section having each side as 'd' will be

√d
√(2πd)
√(2d)
D

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Process Equipment and Plant Design
The approximate liquid depth in an agitation tank is equal to (where, d = tank diameter)

0.75 d
D
2 d
0.5 d

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Process Equipment and Plant Design
In case of a shell and tube heat exchanger, the effect of L/D on inside film heat transfer co-efficient (hi) vanishes after a Reynold number of

10000
5000
1000
3000

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Process Equipment and Plant Design
The length of straight rectangular weir used on cross-flow trays is generally __________ the column diameter.

0.6-0.8 times
Twice
Equal to
2 ft irrespective of (for column > 3 ft diameter)

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Process Equipment and Plant Design
Shortest distance between two tubes is

Called tube clearance
More in case of triangular pitch as compared to square pitch of tube layout
Called tube pitch
None of these

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Process Equipment and Plant Design
Lug support is

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

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