Heat Transfer In the free convection regime of pool boiling, the heat flux is proportional to Δt5/4 Δt1/2 Δt Δt2 Δt5/4 Δt1/2 Δt Δt2 ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer The heat transfer by radiation from a mild steel surface is to be reduced by reducing the emissivity of the surface. This can be best achieved by Painting the surface white (with aluminium paint) Roughening the surface Painting the surface black Giving the surface a mirror finish Painting the surface white (with aluminium paint) Roughening the surface Painting the surface black Giving the surface a mirror finish ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Economy of an evaporator is influenced by the Steam pressure Feed temperature Number of effect Both B & C Steam pressure Feed temperature Number of effect Both B & C 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 0.55 0.45 0.85 0.35 0.55 0.45 0.85 0.35 ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Finned tube heat exchangers facilitate very large temperature drop through tube wall give larger area per tube are used for smaller heat load use metal fins of low thermal conductivity facilitate very large temperature drop through tube wall give larger area per tube are used for smaller heat load use metal fins of low thermal conductivity ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer A long iron rod initially at a temperature of 20°C has one end dipped in boiling water (100°C) at time, t = 0. The curved surface of the rod is insulated so that heat conduction is one dimensional in the axial direction. The temperature at a distance 100 mm from the dipped end becomes 40°C at time, t = 200 s. The same temperature is achieved at a distance of 200 mm from the dipped end at time t = 356 s t = 283 s t = 800 s t = 400 s t = 356 s t = 283 s t = 800 s t = 400 s ANSWER DOWNLOAD EXAMIANS APP
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