Process Equipment and Plant Design
Triangular pitch tube layout as compared to square pitch in a shell and tube heat exchanger

Permits the use of less tubes in a given shell diameter
Permits the use of more tubes in a given shell diameter
Both B and C
Facilitates comparatively easier external cleaning because of large clearance

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Process Equipment and Plant Design
In a bag filter, the pressure drop increases directly as the

Density of the gas and inversely as viscosity of the gas
None of these
Viscosity of the gas and inversely as density of the gas
Density of the gas, but is independent of the viscosity of the gas

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

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