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

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

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Process Equipment and Plant Design
In the design of a shell and tube heat exchanger, the corrosion allowance

Need not be provided for non-pressure parts like tie rods, spacers, baffles, supports etc
All of these
For internal cover and tube sheet is provided on both the sides
For carbon steel and cast iron pressure parts is 1.5 mm (except for tubes) and for severe conditions it is 3 mm

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Process Equipment and Plant Design
Pick out the wrong statement pertaining to the design of a basket type evaporator.

Downtake is formed by the annular space between the bundle and the shell
There is no central downtake
It is used for high viscosity liquor having large rate of scaling
The tube bundle is suspended on bracket

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