Heat Transfer Bulk of the convective heat transfer resistance from a hot tube surface to the fluid flowing in it, is 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 In the central core of the fluid ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer With increase in temperature, the total emissivity of conductors Decreases Remains same Increases Decreases linearly Decreases Remains same Increases Decreases linearly ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer For a fluid flowing in an annulus space, the wetted perimeter for heat transfer and pressure drop are Same Linearly related Never different Different Same Linearly related Never different Different ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer The outlet temperature of cooling water in a heat exchanger is generally not allowed to exceed above 50°C in industrial practice mainly to avoid Its evaporation loss Excessive corrosion Decrease in heat exchanger efficiency Uneconomic LMTD Its evaporation loss Excessive corrosion Decrease in heat exchanger efficiency Uneconomic LMTD ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer The variation of thermal conductivity of a metal with temperature is often correlated using an expression of the form K = K₀ + at. where, K is the thermal conductivity and T is the temperature (in °K). The units of 'a' in SI system will be None, A is just a number W/m.k W/m W/m.k² None, A is just a number W/m.k W/m W/m.k² ANSWER DOWNLOAD EXAMIANS APP
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