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Process Equipment and Plant Design

Process Equipment and Plant Design
Minimum baffle spacing recommended in a shell and tube heat exchanger is equal to

5 cms
I.D. of the shell
25 cms
40% of the I.D. of the shell

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Process Equipment and Plant Design
Friction factor for turbulent flow in a new pipe is given by

f = 0.22 NRe0.05
f = 25/NRe
f = 16/NRe
f = 0.04/NRe0.16

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Process Equipment and Plant Design
The necessary wall thickness for a metallic storage vessel is a function of the

Ultimate tensile strength (or yield point) of the material and operating temperature
Diameter of the vessel
Operating pressure and welding/joint efficiency
All of these

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Process Equipment and Plant Design
At the following point for a given packing and set of fluids, the pressure drop per metre of packed height, with variation in fluid rates and operating pressure

Decreases
Increases
May increase or decrease depending upon the solubility of the gas in the liquid
Remains same

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Process Equipment and Plant Design
Flanges are connected to pipes by

Brazing
Welding
All of these
Screwing

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Process Equipment and Plant Design
In a shell and tube heat exchanger, the shortest centre to centre distance between the adjacent tubes is

Called tube clearance
None of these
Always less than the diameter of the tube
Called tube pitch

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