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 Heat transfer occurs by natural convection because change in temperature causes difference in Viscosity Density Thermal conductivity Heat capacity Viscosity Density Thermal conductivity Heat capacity ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Boiling point of a solution according to Duhring's rule is a linear function of the __________ of water. Density Viscosity Thermal conductivity Boiling point (at the same pressure) Density Viscosity Thermal conductivity Boiling point (at the same pressure) ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Which of the following has the lowest Prandtl number? Transformer oil Molten sodium (a coolant used in fast breeder reactor) Dilute H₂SO₄ Water Transformer oil Molten sodium (a coolant used in fast breeder reactor) Dilute H₂SO₄ Water ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer When does the heat generated by fluid friction becomes appreciable compared to the heat transferred between the fluids? At high fluid velocity When fluid flows past a smooth surface At low velocity None of these At high fluid velocity When fluid flows past a smooth surface At low velocity None of these ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Critical value of the __________ number governs the transition from laminar to turbulent flow in free convection heat transfer. Both A & B Prandtl & Grashoff Reynolds Grashoff Both A & B Prandtl & Grashoff Reynolds Grashoff ANSWER DOWNLOAD EXAMIANS APP
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