List of top Questions asked in CUET (PG)

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:
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:
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\(^{-1}\).
Compared to saturated oils, unsaturated oils have:
In forced convection, the Nusselt number (Nu) is a function of:
A pipe with diameter 25 cm at the entrance carries oil with specific gravity 0.9 at a velocity of 3 m/s. At the exit section the diameter of the pipe is 20 cm. The velocity at the exit section is:
Which one is an example of branched polymer?
Which one is appropriate for the poly-ethyleneterephthalate?
The unit step response of the transfer function \( G(s) = \frac{1}{s^2 + 2s + 3} \) has:
Buna-S is a polymer of:
A first-order system with unity gain and time constant \( \tau \) is subjected to sinusoidal input having a frequency \( \omega \) of \( \frac{1}{\tau} \). The amplitude ratio for such system is:
A step change of magnitude is introduced to a system having the transfer function \[ G(s) = \frac{2}{s^2 + 2s + 4} \] The percent overshoot is:
Sulfa drugs are derivatives of:
HDPE water storage tank is an example of:
Which of the following conditions is not satisfied by an ideal solution?
For a pure substance, which of the following does not change during condensation?
From the following list, identify the properties which are equal in both vapor and liquid phases at equilibrium:
(A) Temperature
(B) Density
(C) Enthalpy
(D) Chemical potential
Choose the \textbf{correct} answer from the options given below:
For a pure substance, the Maxwell's relation obtained from the fundamental property relation \( dU = T dS - P dV \) is:
If the temperature of a saturated water is increased infinitesimally at constant entropy, the resulting state of water is:
In an internal combustion engine, during the compression strokes, the heat rejected to the cooling water is 75 J/g and the work input is 120 J/g. The change in internal energy of the working fluid is:
Break-even point increases with:
A gaseous system contains \( H_1 \), \( H_2 \), and \( I_2 \) which participate in the gas phase reaction: \[ 2H_1 \rightleftharpoons H_2 + I_2 \] At a state of reaction equilibrium, the number of thermodynamic degrees of freedom is: