Heat Transfer
An evaporator while concentrating an aqueous solution from 10 to 40% solids evaporates 30000 kg of water. The amount of solids handled by the system in kg is

9000
4600
3000
4000

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Heat Transfer
LMTD for counterflow and prallel flow heat exchanger will be the same, when the

None of these
Outlet temperature of hot fluid is less than the outlet temperature of the cold fluid
Cold fluid is heated to a certain temperature by condensing steam (isothermal fluid)
Outlent temperature of both the hot and cold fluid are same

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