Process Equipment and Plant Design
In perforated plate towers, the

All of these
Hole sizes may be around 1/8" or 3/16"
Pressure drop is less compared is similar bubble cap towers
Total hole area may be around 6 to 15% of tower cross-sectional area

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Process Equipment and Plant Design
Mc Cable Thiele method used for finding theoretical stages in a distillation column assumes that the

Trouton's rule is applicable
Sensible heat differences are small, because the temperature changes from tray to tray is small
All of these
Liquid/vapor loading across the column remains constant

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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?

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

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