Heat Transfer Bulk of the convective heat transfer resistance from a hot tube surface to the fluid flowing in it, is Mainly confined to a thin film of fluid near the surface Uniformly distributed throughout the fluid In the central core of the fluid None of these Mainly confined to a thin film of fluid near the surface Uniformly distributed throughout the fluid In the central core of the fluid None of these ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer With increase in temperature, the total emissivity of conductors Decreases linearly Increases Remains same Decreases Decreases linearly Increases Remains same Decreases ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer For a fluid flowing in an annulus space, the wetted perimeter for heat transfer and pressure drop are Linearly related Same Different Never different Linearly related Same Different Never 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 Uneconomic LMTD Excessive corrosion Decrease in heat exchanger efficiency Its evaporation loss Uneconomic LMTD Excessive corrosion Decrease in heat exchanger efficiency Its evaporation loss 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 W/m.k None, A is just a number W/m.k² W/m W/m.k None, A is just a number W/m.k² W/m ANSWER DOWNLOAD EXAMIANS APP
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