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 Painting the surface white (with aluminium paint) Giving the surface a mirror finish Roughening the surface Painting the surface black Painting the surface white (with aluminium paint) Giving the surface a mirror finish Roughening the surface Painting the surface black ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer In case of __________ boiling, the bubbles formed on a submerged hot surface get absorbed in the mass of the liquid. None of these Pool Low pressure Nucleate None of these Pool Low pressure Nucleate ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Maximum heat transfer rate is obtained in __________ flow. Turbulent Creeping Transition region Laminar Turbulent Creeping Transition region Laminar ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer For large heat transfer area requirement, shell and tube heat exchanger is preferred, because it Is more economical All of these Is easy to operate and maintain Occupies smaller space Is more economical All of these Is easy to operate and maintain Occupies smaller space ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer The Graetz number is concerned with the heat transfer in turbulent flow absorption with chemical reaction mass transfer between a gas and a liquid heat transfer in laminar flow heat transfer in turbulent flow absorption with chemical reaction mass transfer between a gas and a liquid heat transfer in laminar flow ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Nusselt number is the ratio of the temperature gradient at the wall to That across the entire pipe None of these Temperature difference Heat flux That across the entire pipe None of these Temperature difference Heat flux ANSWER DOWNLOAD EXAMIANS APP
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