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

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

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Process Equipment and Plant Design
For turbulent flow (NRe > 2100) of low viscosity fluid (μ > 20cp) in steel pipes, the optimum inside pipe diameter is given by(where, Q = fluid flow rate, ft³/sec.ρ = fluid density, lb/ft³ μ = fluid viscosity, centipoise Di = optimum inside pipe diameter, inches)

Di, opt = 3 Q0.36 . μ0.88
Di, opt = 3.9 Q0.45 . μ0.95
Di, opt = 3.9 Q0.45 ρ0.13
Di, opt = 4.7 Q0.36 . μ3.2ρ0.13

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