Mass Transfer Plate towers are preferred to packed towers, when large temperature changes are involved, because of the reason that the None of these Packing may be crushed due to thermal expansion/contraction of the components of the equipments Viscosity variation of the fluids may cause channeling/flooding Pressure drop in the equipment will be very high None of these Packing may be crushed due to thermal expansion/contraction of the components of the equipments Viscosity variation of the fluids may cause channeling/flooding Pressure drop in the equipment will be very high ANSWER DOWNLOAD EXAMIANS APP
Mass Transfer In a packed tower, the value of HETP equals HTUOG, when the equilibrium and the operating lines are (where, HETP = height equivalant to a theoretical plate HTUOG = overall gas phase height of a transfer unit) Straight Neither A nor B Both A & B Parallel Straight Neither A nor B Both A & B Parallel ANSWER DOWNLOAD EXAMIANS APP
Mass Transfer When the temperature and humidity of air is low, we usually use __________ draft cooling tower. Natural Induced Forced None of these Natural Induced Forced None of these ANSWER DOWNLOAD EXAMIANS APP
Mass Transfer Penetration theory relates the average mass transfer co-efficient (K) with diffusivity (D) as K ∝ D K ∝ √D K ∝ D1.5 K ∝ D2 K ∝ D K ∝ √D K ∝ D1.5 K ∝ D2 ANSWER DOWNLOAD EXAMIANS APP
Mass Transfer Small dia distillation column can be a Any of these Packed column Bubble cap Sieve tray Any of these Packed column Bubble cap Sieve tray ANSWER DOWNLOAD EXAMIANS APP
Mass Transfer For the gas absorption, the height of a transfer unit, based on the gas phase is given by (G: superficial molar gas velocity, L: superficial molar liquid velocity, FG:mass transfer co-efficient, mols/m² , a: in-terfacial area per unit volume of tower) FG/(G.a) F/(FG.a) (G.a)/FG L/(FG.G) FG/(G.a) F/(FG.a) (G.a)/FG L/(FG.G) ANSWER DOWNLOAD EXAMIANS APP
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