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Process Equipment and Plant Design

Process Equipment and Plant Design
The practical representative values of HETP for a number of commercial operations lies within a range of __________ metre.

0.2-0.5
1.2-1.5
0.1-0.2
0.4-0.9

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Process Equipment and Plant Design
In a shell and tube heat exchanger, the overall heat transfer co-efficient is proportional to the tube side (volumetric flow rate)0.8. This is valid, only when the ratio of the tube side film resistance to the total resistance is almost equal to

1
∞
20.8
2

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Process Equipment and Plant Design
Normally, the ratio of the total riser area to the tower cross sectional area (for bubble cap towers of diameter more than 3 ft) is around

0.35-0.75
0.1-0.2
0.4-0.6
0.55-0.85

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Process Equipment and Plant Design
In a shell and tube heat exchanger having triangular pitch, the shell side equivalent diameter is given by

(4p² - πd²/4)/πd
4(0.86p² - πd²/4)/πd
4(0.86p² - πd²)/πd
(p² - πd²/4)/πd

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Process Equipment and Plant Design
Shortest distance between two tubes is

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

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

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