Two plates spaced 150 mm apart are maintained at 1000°C and 70°C. The heat transfer will take place mainly by ___________________?

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Unit of thermal conductivity in S.I. units is__________________?

A. J/m2 sec B. J/m °K sec C. W/m °K D. A. and C. above E. B. and C. above...

According to Prevost theory of heat exchange ___________________?

A. it is impossible to transfer heat from low temperature source to t high temperature source B. heat transfer by radiation requires no medium C. all bodies above absolute zero emit radiation D. heat transfer in most of the cases takes place by combination of conduction, convection and radiation E. rate of heat transfer depends … According to Prevost theory of heat exchange ___________________?Read More...

A non-dimensional number generally associated with natural convection heat transfer is________________?

A. Grashoff number B. Nusselt number C. Weber number D. Prandtl number E. Reynold number...

The value of the wavelength for maximum emissive power is given by ___________________?

A. Wien’s law B. Planck’s law C. Stefan’s law D. Fourier’s law E. Kirchhoff’s law...

The total emissivity power is .defined as the total amount of radiation emitted by a black body per unit_______________?

A. temperature B. thickness C. area D. time E. area and time...