Heat Transfer The unit of heat transfer co-efficient in SI unit is J/M2°K W/m°K J/m°K W/m2°K J/M2°K W/m°K J/m°K W/m2°K ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer The most conducive surface for dropwise condensation to occur is the __________ surface. Oily Coated Glazed & polished Smooth Oily Coated Glazed & polished Smooth ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer The heat flux in the nucleate boiling regimes is proportional to (where, ΔT = excess temperature) (ΔT)² √(ΔT) (ΔT)³ (ΔT)⁴ (ΔT)² √(ΔT) (ΔT)³ (ΔT)⁴ ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer A steel sphere of radius 0.1 m at 400°K is immersed in an oil at 300°K. If the centre of the sphere reaches 350°K in 20 minutes, how long will it take for a 0.05 m radius steel sphere to reach the same temperature (at the centre) under identical conditions ? Assume that the conductive heat transfer co-efficient is infinitely large. 40 minutes 10 minutes 5 minutes 20 minutes 40 minutes 10 minutes 5 minutes 20 minutes ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Three solid objects of the same material and of equal mass-a sphere, a cylinder (length = diameter) and a cube are at 500°C initially. These are dropped in a quenching bath containing a large volume of cooling oil each attaining the bath temperature eventually. The time required for 90% change in temperature is the smallest for Cube Sphere Cylinder Equal for all the three Cube Sphere Cylinder Equal for all the three ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer If the thermal conductivity of a wall material is independent of temperature, the steady state temperature distribution in the very large thin plane wall having steady, uniform surface tempeature follows __________ law. Logarithmic Parabolic Linear Hyperbolic Logarithmic Parabolic Linear Hyperbolic ANSWER DOWNLOAD EXAMIANS APP
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