Heat Transfer Calburn analogy is applicable for the value of Prandtl number from 0.001 to 1 120 to 400 0.6 to 120 0.5 to 5 0.001 to 1 120 to 400 0.6 to 120 0.5 to 5 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 Painting the surface white (with aluminium paint) Painting the surface black Roughening the surface Giving the surface a mirror finish Painting the surface white (with aluminium paint) Painting the surface black Roughening the surface Giving the surface a mirror finish ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Which is the best tube arrangement (in a shell and tube heat exchanger) if the fluids are clean and non-fouling? Diagonal square pitch Square pitch None of these Triangular pitch Diagonal square pitch Square pitch None of these Triangular pitch ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Maximum heat transfer rate is obtained in __________ flow. Transition region Turbulent Creeping Laminar Transition region Turbulent Creeping Laminar ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer In a heat exchanger with steam outside the tubes, a liquid gets heated to 45°C, when its flow velocity in the tubes is 2 m/s. If the flow velocity is reduced to 1 m/s, other things remaining the same, the temperature of the exit liquid will be Less than 45°C Equal to 45°C Initially decreases and remains constant thereafter More than 45°C Less than 45°C Equal to 45°C Initially decreases and remains constant thereafter More than 45°C ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer For a perfectly transparent surface (like gases), the Reflectivity = 0 Transmissivity = 1 All of these Absorptivity = 0 Reflectivity = 0 Transmissivity = 1 All of these Absorptivity = 0 ANSWER DOWNLOAD EXAMIANS APP
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