Heat Transfer
Fresh orange juice contains 12% (by weight) solids and the rest water 90% of the fresh juice is sent to an evaporator to remove water and subsequently mixed with the remaining 10% of fresh juice. The resultant product contains 40% solids. The kg of water removed from 1 kg fresh juice is

0.7
0.6
0.5
0.4

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Heat Transfer
In the equation Q = UAΔt; Δt is

Arithmetic mean temperature difference
Logarithmic mean temperature difference
Geometric mean temperature difference
The difference of average bulk temperatures of hot and cold fluids

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