The thermal radiative flux from a surface of emissivity = 0.4 is 22.68 kW/m2. The approximate surface temperature (K) is (Stefan-Boltzmann constant = 5.67 × 10-8 W/m2.K4) ?

Related Mcqs:

LMTD can’t be used as such without a correction factor for the_________________?

A. Multipass heat exchanger B. Baffled heat exchanger C. Condensation of mixed vapour in a condenser D. All A. B. and C....

In case of heat transfer by conduction in a hollow cylinder, ______________ mean area is used to calculate the heat transfer rate?

A. Geometric B. Arithmetic C. Logarithmic D. Either A., B. or C....

Heat transfer rate described by Fourier’s law will decrease, if the _____________ increases?

A. Thermal conductivity B. Thickness C. Temperature difference D. Heat transfer area...

What is the logarithmic mean of r1 and r2 ?

A. (r1 – r2)/ln(r1/r2) B. (r1 – r2)/ln(r2/r1) C. (r2 – r1)/ln(r1/r2) D. (r1 – r2)/-ln(r1/r2)...

The critical radius of insulation for cylindrical pipe is (where, hi = heat transfer coefficient at inside of the pipe) ?

A. K/h0 B. 2K/h0 C. hi/K D. 2hi/K...