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Process Equipment and Plant Design

Process Equipment and Plant Design
Which of the following lengths of heat exchanger tubes are normally not used in practice?

2.5 metres
0.5 metre
6 metres
10 metres

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Process Equipment and Plant Design
If 'D' is the inside diameter of the shell of a shell and tube heat exchanger, then the baffle spacing is usually in the range of

D/2 or minimum 2" to 5D
D/5 or minimum 2" to 5D
None of these
D/5 or minimum 2" to D

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Process Equipment and Plant Design
Le/D for a Tee (used as elbow, entering branch) would be

More than that for Tee (used as elbow, entering run)
Both B and C
Less than that for Tee (used as elbow, entering run)
Around 90

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Process Equipment and Plant Design
The minimum baffle height should be

3/4 of the tank height
Equal to the impeller diameter
Twice the impeller diameter
Twice the tank diameter

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Process Equipment and Plant Design
In the downcomer of a distillation column, the minimum recommended residence time is about __________ seconds.

2.5
12.5
17.5
5

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Process Equipment and Plant Design
The equivalent diameter for fluid flow through a channel of constant non-circular cross section of area 'A' is given by (where, P = perimeter of the channel in contact with the fluid)

4 P/A
√A
4 A/P
A/P

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