Heat Transfer With increase in temperature, the thermal conductivity of a gas Decreases Remains same Increases May increase or decrease depending on the type of gas Decreases Remains same Increases May increase or decrease depending on the type of gas ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Fluid motion in the natural convection heat transfer between a solid surface and a fluid in contact with it, results from the Buoyancy of the bubbles produced at active nucleation site Temperature gradient produced due to density difference Existence of thermal boundary layer None of these Buoyancy of the bubbles produced at active nucleation site Temperature gradient produced due to density difference Existence of thermal boundary layer None of these ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Bulk of the convective heat transfer resistance from a hot tube surface to the fluid flowing in it, is In the central core of the fluid Uniformly distributed throughout the fluid Mainly confined to a thin film of fluid near the surface None of these In the central core of the fluid Uniformly distributed throughout the fluid Mainly confined to a thin film of fluid near the surface None of these ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer The average heat transfer co-efficient over the entire length of the plate (ha) and the local heat transfer co-efficient (hL), in case of heat transfer over a flat plate in lminar zone is related as Ha = 0.8hL Ha = hL Ha= 5hL Ha = 2hL Ha = 0.8hL Ha = hL Ha= 5hL Ha = 2hL ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Condensing film co-efficient for steam on horizontal tubes ranges from 5000 to 15000 Kcal/hr.m² .°C. Condensation of vapor is carried out inside the tube in a shell and tube heat exchanger, when the Temperature of the incoming vapor is very high Higher condensing film co-efficient is desired Lower pressure drop through the exchanger is desired Condensate is corrosive in nature Temperature of the incoming vapor is very high Higher condensing film co-efficient is desired Lower pressure drop through the exchanger is desired Condensate is corrosive in nature ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer A __________ evaporator employs an annular downtake. None of these Long tube vertical Basket type Horizontal None of these Long tube vertical Basket type Horizontal ANSWER DOWNLOAD EXAMIANS APP
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