Mass Transfer Questions

• Which is the controlling factor for a drum drier?
• When the temperature and humidity of air is low, we usually use __________ draft cooling tower.
• Mass transfer rate between two fluid phases does not necessarily depend on the __________ of the two phases.
• With increase in pressure, the relative volatility for a binary system
• In batch distillation with constant reflux, overhead product composition __________ with time.
• Overall efficiency of the distillation column is
• Which of the following unit operations makes use of Thiele-Geddes equation?
• The equipment frequently used for adiabatic humidification-cooling operation with recirculating liquid is
• As the reflux ratio in a distillation coloumn is increased from the minimum, the
• Total reflux in a distillation operation requires minimum
• Which of the following remains constant during sensible cooling process?
• Air initially at 101. 3 kPa and 40°C and with a relative humidity of 50%, is cooled at constant pressure to 30°C. The cooled air has a
• Dew point of a gas-vapour mixture
• To increase the absorption factor, (where, G = gas flow rate, S = solvent flow rate)
• The term "cooling range" in a cooling tower refers to the difference in the temperature of
• In distillation columns, the number of bubble caps per tray primarily depends upon the
• The mass diffusivity, the thermal diffusivity and the eddy momentum diffusivity are same for, NPr = NSc = __________
• The difference of wet bulb temperature and adiabatic saturation temperature of unsaturated mixture of any system is
• Absorption factor is defined as (where, S1 = slope of the operating line S2 = slope of the equilibrium curve)
• Fenske's equation for determining the minimum number of theoretical stages in distillation column holds good, when the