Mass Transfer
Pick out the correct relationship. (where, Ri = internal reflux ratio Ro = external reflux ratio. )

(1 - Ro) = Ro/Ri
(1 - Ri) = Ro/Ri
(1 + Ri) = Ro/Ri
(1 + Ro) = Ro/Ri

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Mass Transfer
Heat load in a cooling tower

Neither A nor B
Both A & B
Means the amount of heat thrown away (KCal/hr.) by the cooling tower
Is equal to the number of kg, of water circulated times the cooling range

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