Process Equipment and Plant Design
LMTD correction factor is used in heat exchanger design for

Counter flow of hot and cold fluids
Fouling fluids
Double pipe heat exchanger
Multipass shell and tube heat exchanger

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Process Equipment and Plant Design
Which of the following is not a valid assumption in continuous binary distillation for calculating the number of equilibrium stages by Mc-Cabe-Thiele's method?

Heat of mixing of normal liquid is assumed to be zero
Reflux is not a saturated liquid
Sensible heat changes for vapour & liquid are negligibly small
Molar latent heat of the two components are equal

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