Heat Transfer For a perfectly transparent surface (like gases), the Absorptivity = 0 All of these Reflectivity = 0 Transmissivity = 1 Absorptivity = 0 All of these Reflectivity = 0 Transmissivity = 1 ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer In counter flow compared to parallel flow, Less surface area is required for a given heat transfer rate Both A and B LMTD is greater More surface area is required for a given heat transfer rate Less surface area is required for a given heat transfer rate Both A and B LMTD is greater More surface area is required for a given heat transfer rate ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer The thermal boundary layer at NPr > 1 And the hydrodynamic boundary layer are identical Is thinner than hydrodynamic boundary layer Is thicker than hydrodynamic boundary layer Disappears And the hydrodynamic boundary layer are identical Is thinner than hydrodynamic boundary layer Is thicker than hydrodynamic boundary layer Disappears ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Conduction occurs in the buffer zone for a fluid flowing through a heated pipe, only when Prandtl number is < 1 L >1 0.1 < 1 L >1 0.1 ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Prandtl number for most of dry gases is about 0.72 70 0.001 150 0.72 70 0.001 150 ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer The main purpose of providing fins on heat transfer surface is to increase the Temperature gradient Heat transfer area Heat transfer co-efficient Mechanical strength of the equipment Temperature gradient Heat transfer area Heat transfer co-efficient Mechanical strength of the equipment ANSWER DOWNLOAD EXAMIANS APP
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