21101. At minimum reflux ratio for a given separation
21102. Relative humidity is the ratio of the
21103. In batch distillation with constant reflux, overhead product composition __________ with time.
21104. Psychrometry deals with the properties of gas-vapor mixture. Humidity can be determined by the measurement of the __________ of a fibre.
21105. Heat in BTU necessary to increase the temperature of 1 lb of gas and its accompanying vapour by 1°F is called the
21106. Sulpha drugs may be effective against diseases caused by?
21107. The mass diffusivity, the thermal diffusivity and the eddy momentum diffusivity are same for, NPr = NSc = __________
21108. Dew point of a gas-vapour mixture
21109. In a packed absorption tower, if the equilibrium and operating lines are both straight lines, then the ratio, HETP/HTUOG __________ the absorption factor.
21110. Which of the following plays an important role in problems of simultaneous heat and mass transfer ?
21111. In case of an absorber, the operating
21112. As the reflux ratio in a distillation coloumn is increased from the minimum, the
21113. Absorption factor is defined as (where, S1 = slope of the operating line S2 = slope of the equilibrium curve)
21114. 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 ?
21115. Which of the following remains constant during sensible cooling process ?
21116. Physical absorption is
21117. Make up water is required in a cooling tower to replace the water lost by
21118. Which of the following quantities need not be fixed before starting the design of a co-current absorber ?
21119. Mass transfer co-efficient of liquid is
21120. Absorption accompanied with chemical reaction is exemplified by the absorption of
21121. Which of the following unit operations makes use of Thiele-Geddes equation ?
21122. Which of the following liquid-vapor contacting devices provides maximum contact surface area for a particular duty ?
21123. The equipment frequently used for adiabatic humidification-cooling operation with recirculating liquid is
21124. Chemisorption (chemical adsorption) is
21125. The rate of solid-liquid extraction is limited by the
21126. Raoult's law applies to the
21127. In distillation columns, the number of bubble caps per tray primarily depends upon the
21128. In distillation, overhead product contains
21129. With increase in pressure, the relative volatility for a binary system
21130. Low viscosity absorbent is preferred for reasons of
21131. Mass transfer co-efficient (K) and diffusivity (D) are related according to film theory as
21132. The McCabe Δ L law states that the
21133. Bollman extractor
21134. The relation, Sc = Pr = 1, is valid, when the mechanism of __________ ansfer is same.
21135. A coalescer in a mixer-settler liquid-liquid extraction coloumn
21136. For the same feed, feed quality and separation (in a distillation column), with the increase of total pressure, the number of ideal plates will
21137. ’Akhila Thiruttu’was the publication of
21138. 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
21139. 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
21140. In the constant rate period of the rate of drying curve for batch drying,
21141. 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%).
21142. Agitator is provided in a crystalliser for
21143. __________ diffusion is used for separating the isotopes of methane.
21144. Ordinary diffusion process is also called __________ diffusion.
21145. Which is not the poem of O.N.V.Kuruppu?
21146. Pick out the wrong statement pertaining to the rotary dryer.
21147. The reason for preferring packed towers over plate towers in distillation practice is that the packed tower operation gives
21148. If the path of liquid across the plate is very long as in case of large diameter tower, Murphree efficiency can be __________ percent.
21149. 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