The mass diffusivity, the thermal diffusivity and the eddy momentum diffusivity are same for, NPr = NSc = __________
Dew point of a gas-vapour mixture
In case of an absorber, the operating
In a packed absorption tower, if the equilibrium and operating lines are both straight lines, then the ratio, HETP/HTUOG __________ the absorption factor.
Which of the following plays an important role in problems of simultaneous heat and mass transfer ?
As the reflux ratio in a distillation coloumn is increased from the minimum, the
Absorption factor is defined as (where, S1 = slope of the operating line S2 = slope of the equilibrium curve)
A plait point is the point on the solubility curve, where the tie line reduces to a point. What is the number of plait point for a ternery system containing twopairs of partially miscible liquids ?
Which of the following remains constant during sensible cooling process ?
Physical absorption is
Make up water is required in a cooling tower to replace the water lost by
Which of the following quantities need not be fixed before starting the design of a co-current absorber ?
Mass transfer co-efficient of liquid is
Absorption accompanied with chemical reaction is exemplified by the absorption of
Which of the following unit operations makes use of Thiele-Geddes equation ?
Which of the following liquid-vapor contacting devices provides maximum contact surface area for a particular duty ?
The equipment frequently used for adiabatic humidification-cooling operation with recirculating liquid is
Chemisorption (chemical adsorption) is
The rate of solid-liquid extraction is limited by the
Raoult's law applies to the
In distillation columns, the number of bubble caps per tray primarily depends upon the
In distillation, overhead product contains
With increase in pressure, the relative volatility for a binary system
Low viscosity absorbent is preferred for reasons of
Mass transfer co-efficient (K) and diffusivity (D) are related according to film theory as