Process Equipment and Plant Design
The ends of a cylinderical vessel can be closed by a head, which can be one of the four shapes. For the same thickness, choose the one which can withstand the highest pressure.

Hemispherical
Ellipsoidal
Flat plate
Torispherical

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

It is unsuitable for concentrating those liquids, which form a scale or deposit salt
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
Liquor flows inside the tube, while the steam is outside submerging the tube

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