List of top Chemical, Thermal and Polymer Engineering Questions on Mass Transfer

How does heat transfer enhance due to turbulence?
A. Decrease in thermal resistance.
B. Increase in convective coefficient.
C. Mixing is induced by velocity change.
D. Thinning of boundary layer.
Choose the correct answer from the options given below:
Which of the polymer is not prepared by condensation polymerization?
For the relationship, $dH=TdS+VdP$, the Maxwell equation is:
Which one is not correct relationship?
The average degree of polymerization of polystyrene is 1000. The number average molecular weight of polystyrene is:
Nylon 6,6 is synthesized by the reaction of adipic acid and hexamethylene diamine. If the extent of reaction is 95% for the equimolar feed ratio of the monomers, then the number average degree of polymerization is:
Which law is used to describe steady-state diffusion in gases?
Match LIST-I with LIST-II and select the correct answer using the codes given below the lists.\[\begin{array}{|c|c|} \hline \textbf{LIST-I} & \textbf{LIST-II} \\ \hline \text{A. Rotary atomizer} & \text{1. Kinetic energy} \\ \hline \text{B. Relative volatility} & \text{2. Centrifugal energy} \\ \hline \text{C. Pneumatic nozzle} & \text{3. Distillation} \\ \hline \text{D. Selectivity} & \text{4. Liquid-liquid extraction} \\ \hline \end{array}\] Choose the correct answer from the options given below:
The McCabe-Thiele method used to find the number of theoretical stages required in a distillation operation is based on the assumption(s) that:
Steady state temperature reached by a small amount of liquid evaporating into a large amount of unsaturated vapour-gas mixture is:
For economical operation in gas absorption, the operating line approximately:
Which of the following is used as an 'entrainer' in the separation of acetic acid-water mixture by distillation?
A multiple effect evaporator has a capacity to process 4000 kg of solid caustic soda per day when it is concentrating from 10% to 35% solids. The water evaporated in kg per day is:
In the McCabe-Thiele diagram for binary distillation, vertical feed line represents ......., and horizontal feed line represents ............ feed.
Sugar is leached from sugar beets with:
In a small column, local efficiency is equal to Murphree efficiency, and in a large column, local efficiency is:
In the absorption of a solute gas from a mixture containing inerts in a solvent, it has been observed that the overall gas transfer coefficient is nearly equal to the individual gas film transfer coefficient. It may therefore be concluded that:
Flash distillation is used at a large scale in:
HETP is numerically equal to HTU only when the operating line:
Which of the following is a continuous filter?