Heat Transfer
Nusselt number (for forced convection heat transfer) is a function of the __________ number.

Prandtl
Both Reynolds & Prandtl
Reynolds
None of the listed here

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Heat Transfer
The advantage of backward feed multiple effect evaporators over forward feed units is that

Equal heat transfer co-efficients exist in various effects
Most concentrated liquid is at highest temperature
Heat sensitive material can be handled
There is no additional cost of pumping

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