Heat and Mass Transfer Thermal conductivity of solid metals with rise in temperature normally Decreases Remain constant Increases May increase or decrease depending on temperature Decreases Remain constant Increases May increase or decrease depending on temperature ANSWER DOWNLOAD EXAMIANS APP
Heat and Mass Transfer When absorptivity (α) = 1, reflectivity (ρ) = 0 and transmissivity (τ) = 0, then the body is said to be a Black body Grey body Opaque body White body Black body Grey body Opaque body White body ANSWER DOWNLOAD EXAMIANS APP
Heat and Mass Transfer Thermal conductivity of air with rise in temperature Increases Decreases May increase or decrease depending on temperature Remain constant Increases Decreases May increase or decrease depending on temperature Remain constant ANSWER DOWNLOAD EXAMIANS APP
Heat and Mass Transfer The highest thermal diffusivity is of Iron Wood Concrete Lead Iron Wood Concrete Lead ANSWER DOWNLOAD EXAMIANS APP
Heat and Mass Transfer The transfer of heat by molecular collision is smallest in Gases None of these Liquids Solids Gases None of these Liquids Solids ANSWER DOWNLOAD EXAMIANS APP
Heat and Mass Transfer In heat transfer, conductance equals conductivity (kcal/hr/sq.m/°C/cm) divided by Hr (time) Sq. m (area) K.cal (heat) °C (temperature) Hr (time) Sq. m (area) K.cal (heat) °C (temperature) ANSWER DOWNLOAD EXAMIANS APP
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