How does the fluid in climbing film evaporator rise in the tubes? – McqOptions

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1.	How does the fluid in climbing film evaporator rise in the tubes?
A.	There is a pump at the bottom that pushes it
B.	Pressure gradient is applied
C.	The vapour produced then pushes the fluid upward
D.	Temperature gradient causes convection that moves upward
Answer» D. Temperature gradient causes convection that moves upward

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