List of top Mechanical Engineering Questions on Heat Transfer

In the heat flow equation, \( Q = -kA \frac{\Delta T}{L} \), the expression for thermal resistance is given by (k - thermal conductivity, A - Area of cross section, L - thickness of the wall)
If the radius of a current carrying wire is less than the critical radius, then the addition of electrical insulation will enable the wire to carry a higher current because:
A fin of length \( L \) is applied the boundary conditions associated with a very long fin, the adiabatic tip fin, and the finite convective tip fin, which of the following observation about the fin-tip temperature (\( T \)) for these three cases is correct.
For a balanced counter flow heat exchanger where \( \dot{m}_h C_{ph} = \dot{m}_c C_{pc} \), the logarithmic mean temperature difference (LMTD) and temperature profile is:
A slab of 250 mm thick is made up of material ‘X’ and its thermal conductivity is 500 W/m·K. One of the surface is kept at 100°C and another surface is maintained at 25°C. The net heat flux across the surface is:
The characteristics of Planck's black body radiation distribution is given in the options. Which of the following is NOT a characteristic of Planck's black body radiation distribution?
If Stanton number is 0.5, Reynolds number is 39 and Nusselt number is 390, then the Prandtl number is:
Consider the following statements regarding Mass Transfer. Identify the INCORRECT statement.