A wall has two layers of materials A and B; each made of a different material. Both the layers have the same thickness. The thermal conductivity of material A is twice that of B. Under the equilibrium, the temperature difference across the wall is 36°C. The temperature difference across the layer A is ______________ °C?

Related Mcqs:

For a liquid in laminar flow through a very long tube, when the exit fluid temperature approaches the wall temperature, the equation to be used is______________?

A. Nu = 0.023 Re0.8. Pr0.4 B. Nu = (π/2) Gz C. Nu = (2/π) Gz D. Nu = 2Gz0.5...

Pick out the wrong statement ?

A. In drying a solid containing moisture above the critical moisture content the number of degrees of freedom is 2 B. Sherwood number in mass transfer corresponds to Nusselt number in heat transfer and Schmidt number to Prandtl number C. Forced convection is relatively more effective in increasing the rate of mass transfer, if Schmidt … Pick out the wrong statement ?Read More...

If heat transfer rate varies with the time, it is termed as__________________?

A. Forced convection B. Steady state conduction C. Monochromatic radiation D. None of these...

Water is normally used as a coolant in the heat exchange equipments mainly because of its___________________?

A. Abundance & high heat capacity B. Low density C. Low viscosity D. High fluidity...

The dimensionless group in mass transfer that is equivalent to Prandtl number in heat transfer is_________________?

A. Nusselt number B. Sherwood number C. Schmidt number D. Stanton number...