Process Equipment and Plant Design
If a single tube pass heat exchanger is converted to two passes; for the same flow rate, the pressure drop per unit length in tube side will __________ times.

Increase by 1.8
Increase by 21.6
None of these
Decrease by 22

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

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

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