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Process Equipment and Plant Design

Process Equipment and Plant Design
The ratio of tube length to shell diameter in case of liquid shell and tube heat exchanger ranges from

3 to 5
2 to 3
4 to 8
6 to 12

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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.

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

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Process Equipment and Plant Design
In a __________ rivetted joint, the number of rivets decreases from the innermost row to the outermost row.

Zig-zag
Diamond
None of these
Chain

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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

2
∞
20.8
1

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Process Equipment and Plant Design
The average velocity in the tubes of a 1-4 heat exchanger is __________ times that in 1-1 heat exchanger having the same size & number of tubes and operated at same liquid flow rate.

2
4
43834
43832

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Process Equipment and Plant Design
Value of Peclet number = 0, is the representative of

Complete back mixing
Plug flow
Eddy diffusivity = 0
Laminar flow

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