Heat Transfer Out of 100 kcal/second of incident radiant energy on the surface of a thermally transparent body, 300 kcal/second is reflected back. If the transmissivity of the body is 0.25, the emissivity of the surface will be 0.55 0.85 0.45 0.35 0.55 0.85 0.45 0.35 ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer The heat transfer by radiation from a mild steel surface is to be reduced by reducing the emissivity of the surface. This can be best achieved by Roughening the surface Painting the surface white (with aluminium paint) Giving the surface a mirror finish Painting the surface black Roughening the surface Painting the surface white (with aluminium paint) Giving the surface a mirror finish Painting the surface black ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer An equipment which converts the latent or sensible heat of one fluid into the latent heat of vaporisation of another, is called a boiler heat exchanger regenerator recuperator boiler heat exchanger regenerator recuperator ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer If the baffle spacing in a shell and tube heat exchanger increases, then the Reynolds number of the shell side fluid Remains unchanged Decreases Increases Increases or decreases depending on number of shell passes Remains unchanged Decreases Increases Increases or decreases depending on number of shell passes ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Rate of heat transfer by vaporisation from pools of water is affected by the All of these Viscosity of water Nature of heating surface and distribution of bubbles Surface tension of water All of these Viscosity of water Nature of heating surface and distribution of bubbles Surface tension of water ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Graetz number is given by mCp/kL kL/mCp kμ/mCp mCp/kμ mCp/kL kL/mCp kμ/mCp mCp/kμ ANSWER DOWNLOAD EXAMIANS APP
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