35052. In batch distillation with constant reflux, overhead product composition __________ with time.
35053. Psychrometry deals with the properties of gas-vapor mixture. Humidity can be determined by the measurement of the __________ of a fibre.
35054. Heat in BTU necessary to increase the temperature of 1 lb of gas and its accompanying vapour by 1°F is called the
35055. The mass diffusivity, the thermal diffusivity and the eddy momentum diffusivity are same for, NPr = NSc = __________
35056. Dew point of a gas-vapour mixture
35057. In a packed absorption tower, if the equilibrium and operating lines are both straight lines, then the ratio, HETP/HTUOG __________ the absorption factor.
35058. Which of the following plays an important role in problems of simultaneous heat and mass transfer ?
35059. In case of an absorber, the operating
35060. As the reflux ratio in a distillation coloumn is increased from the minimum, the
35061. Absorption factor is defined as (where, S1 = slope of the operating line S2 = slope of the equilibrium curve)
35062. 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 ?
35063. Which of the following remains constant during sensible cooling process ?
35064. Physical absorption is
35065. Make up water is required in a cooling tower to replace the water lost by
35066. Which of the following quantities need not be fixed before starting the design of a co-current absorber ?
35067. Mass transfer co-efficient of liquid is
35068. Absorption accompanied with chemical reaction is exemplified by the absorption of
35069. Which of the following unit operations makes use of Thiele-Geddes equation ?
35070. Which of the following liquid-vapor contacting devices provides maximum contact surface area for a particular duty ?
35071. The equipment frequently used for adiabatic humidification-cooling operation with recirculating liquid is
35072. Chemisorption (chemical adsorption) is
35073. The rate of solid-liquid extraction is limited by the
35074. Raoult's law applies to the
35075. In distillation columns, the number of bubble caps per tray primarily depends upon the
35076. In distillation, overhead product contains
35077. With increase in pressure, the relative volatility for a binary system
35078. Low viscosity absorbent is preferred for reasons of
35079. Mass transfer co-efficient (K) and diffusivity (D) are related according to film theory as
35080. The McCabe Δ L law states that the
35081. Bollman extractor
35082. The relation, Sc = Pr = 1, is valid, when the mechanism of __________ ansfer is same.
35083. A coalescer in a mixer-settler liquid-liquid extraction coloumn
35084. For the same feed, feed quality and separation (in a distillation column), with the increase of total pressure, the number of ideal plates will
35085. ’Akhila Thiruttu’was the publication of
35086. When the liquid phase and vapour phase of a binary system obeys Raoult's and Dalton's law respectively, the relative volatility is the ratio of
35087. The operation involved when the soluble material is largely on the surface of an insoluble solid and is merely washed off by the solvent is called
35088. In the constant rate period of the rate of drying curve for batch drying,
35089. It takes 6 hours to dry a wet solid from 50% moisture content to the critical moisture content of 15%. How much longer it will take to dry the solid to 10% moisture content, under the same drying conditions? (The equilibrium moisture content of the solid is 5%).
35090. Agitator is provided in a crystalliser for
35091. __________ diffusion is used for separating the isotopes of methane.
35092. Ordinary diffusion process is also called __________ diffusion.
35093. Which is not the poem of O.N.V.Kuruppu?
35094. Pick out the wrong statement pertaining to the rotary dryer.
35095. The reason for preferring packed towers over plate towers in distillation practice is that the packed tower operation gives
35096. If the path of liquid across the plate is very long as in case of large diameter tower, Murphree efficiency can be __________ percent.
35097. Compound A is extracted from a solution of A + B into a pure solvent S. A Co-current unit is used for the liquid-liquid extraction. The inlet rate of the solution containing A is 200 moles of B/hr.m2 and the solvent flow, rate is 400 moles of S/m2. hr. The equilibrium data is represented by Y = 3X2 , where Y is in moles of a A/moles of B and X is in moles A/moles of S. The maximum percentage extraction achieved in the unit is
35098. Raoult's law is applicable to the
35099. Weeping in a distillation column
35100. In case of binary distillation, increasing the reflux ratio above optimum does not result in the increase of
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