Heat Transfer Absorptivity and refletivity of a perfect black body are respectively 0 and 1 1 and 0 1 and ? 0 and 0.5 0 and 1 1 and 0 1 and ? 0 and 0.5 ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Conductance is given by(where, x = thickness, A = heat flow area, K = thermal conductivity.) K/Ax KA/x X/KA A/Kx K/Ax KA/x X/KA A/Kx ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Thermal conductivities of most of the liquids __________ with rise in temperature. Increases Decreases Remains unchanged May increase or decrease; depends on the liquid Increases Decreases Remains unchanged May increase or decrease; depends on the liquid ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer A backward feed multiple effect evaporator is better than forward feed for concentrating cold feed, because it provides Lower economy Higher economy Lower capacity Both A & B Lower economy Higher economy Lower capacity Both A & B ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Out of 100 kcal/second of incident radiant energy on the surface of a thermally transparent body, 300 kcal/second is reflected back. If the transmissivity of the body is 0.25, the emissivity of the surface will be 0.35 0.55 0.45 0.85 0.35 0.55 0.45 0.85 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) NPr1/3 NPr NPr-1/3 NPr-1 NPr1/3 NPr NPr-1/3 NPr-1 ANSWER DOWNLOAD EXAMIANS APP
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