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

It is suitable for process, in which the final product is a liquor instead of solid
Its usual dimensions are: tube dia = 2-3 cms; evaporator body dia = 1-4 metres and evaporator height = 2.5-4 metres
It is unsuitable for concentrating those liquids, which form a scale or deposit salt
Liquor flows inside the tube, while the steam is outside submerging the tube

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

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
Need not be provided for non-pressure parts like tie rods, spacers, baffles, supports etc
All of these

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