Heat Transfer Boiling point elevation of an ideal solution Decreases rapidly with temperature rise In independent of pressure Both B and C Increases rapidly with temperature rise Decreases rapidly with temperature rise In independent of pressure Both B and C Increases rapidly with temperature rise ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer While the total emissivity of a perfect black body is unity, the same for a real body is between 0 and 1 0 1 >1 between 0 and 1 0 1 >1 ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer For flow over a flat plate, the ratio of thermal boundary layer thickness, 'xt' and hydrodynamic boundary layer thickness 'x' is equal to (where, NPr = Prandtl number) NPr-1 NPr1/3 NPr NPr-1/3 NPr-1 NPr1/3 NPr NPr-1/3 ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer A 10 cm dia steam pipe, carrying steam at 180°C, is covered with an insulation (conductivity = 0.6 W/m.°C). It losses heat to the surroundings at 30°C. Assume a heat transfer co-efficient of 0.8 W/m².°C for heat transfer from surface to the surroundings. Neglect wall resistance of the pipe and film resistance of steam. If the insulation thickness is 2 cms, the rate of heat loss from this insulated pipe will be Less than the steam pipe with 5 cms insulation Less than that of the uninsulated steam pipe Greater than that for uninsulated steam pipe Equal to that of the uninsulated steam pipe Less than the steam pipe with 5 cms insulation Less than that of the uninsulated steam pipe Greater than that for uninsulated steam pipe Equal to that of the uninsulated steam pipe ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Fruit juice (a heat sensitive material) can be concentrated in a __________ evaporator. High pressure None of these Falling film Long tube High pressure None of these Falling film Long tube ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Grashoff number, which is defined as g . β(Ts - T∞) ρ². L³/μ², is proportional to the ratio of buoyancy force to __________ force. None of these Viscous Inertial Elastic None of these Viscous Inertial Elastic ANSWER DOWNLOAD EXAMIANS APP
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