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

Match the LIST-I with LIST-II:
Plasticizers are added in rubber compounding and processing to improve
Which of the following fuels has the lowest calorific value?
Which amino acid contain Sulfur atom in its side chain?
According to Fick's First Law, the molecular diffusion flux depends on:
Two film theory assumption during mass transfer in gas-liquid is
Constant reflux ratio maintained during binary mixture batch distillation results in:-
5 kg of water at $30^{\circ}C$ is mixed with 4 kg of water at $85^{\circ}C$. The final temperature of the mixture is:
Match LIST-I with LIST-II and select the correct answer using the codes given below the lists.\[\begin{array}{|c|c|} \hline \textbf{LIST-I} & \textbf{LIST-II} \\ \hline \text{A. Stanton number} & \text{I. Natural convection for ideal gases} \\ \hline \text{B. Grashof number} & \text{II. Mass Transfer} \\ \hline \text{C. Peclet number} & \text{III. Forced convection} \\ \hline \text{D. Schmidt number} & \text{IV. Forced convection for small Prandtl number} \\ \hline \end{array}\] Choose the most appropriate answer from the options given below:
Two rods, one of length L and the other of length 2L, are made of the same material and have the same diameter. The two ends of the longer rod are maintained at 100°C. One end of the shorter rod is maintained at 100°C while the other end is insulated. Both the rods are exposed to the same environment at 40°C. The temperature at the insulated end of the shorter rod is measured to be 55°C. The temperature at the mid point of the longer rod would be:
For steady flow and constant value of conductivity, the temperature distribution for a plane wall is:
Baffles are provided in heat exchangers to:
A furnace wall of thickness 1m and surface area 2m² is made of a material whose thermal conductivity is 1 kJ/hr.m°C. The temperature of the inner surface of the wall is 1000°C and of outer surface is 200°C. Heat flow through the wall in kJ/hr will be:
For a shell and tube heat exchanger, the clean overall heat transfer coefficient is calculated as 250 Wm\(^2\)K\(^{-1}\) for a specific process condition. It is expected that the heat exchanger may be fouled during the operation and a fouling resistance of 0.001 m\(^2\)KW\(^{-1}\) is prescribed. The dirt overall heat transfer coefficient is ------------ Wm\(^2\)K\(^{-1}\).
In forced convection, the Nusselt number (Nu) is a function of:
Water enters a storage tank at a temperature, \( T_0 \) and flow rate, \( Q_0 \) and leaving at a flow rate, \( Q \) and temperature, \( T \). There are negligible heat losses in the tank. The area of cross-section of the tank is \( A_c \). The model equation that describes the water temperature variation in the tank is given by: