Heat Transfer Log mean temperature difference (LMTD) cannot be used, if there exists an unsteady state heat transfer co-efficient over the entire heat exchanger is not constant none of the listed here the heat capacity is not constant and there is a phase change. there exists an unsteady state heat transfer co-efficient over the entire heat exchanger is not constant none of the listed here the heat capacity is not constant and there is a phase change. ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Steady state one dimensional heat flow by conduction as given by Fourier's low does not assume that Boundary surfaces are isothermal There is no internal heat generation Material is anisotropic Constant temperature gradient exists Boundary surfaces are isothermal There is no internal heat generation Material is anisotropic Constant temperature gradient exists ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Dropwise condensation occurs on __________ surfaces polished clean and dirt free smooth clean contaminated cooling polished clean and dirt free smooth clean contaminated cooling ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Radiation heat transfer rates does not depend upon the type of absorbing surface none of the listed here distance between the heat source and the object receiving the heat surface area and temperature of the heat source type of absorbing surface none of the listed here distance between the heat source and the object receiving the heat surface area and temperature of the heat source ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Which of the following has the lowest Prandtl number? Dilute H₂SO₄ Molten sodium (a coolant used in fast breeder reactor) Transformer oil Water Dilute H₂SO₄ Molten sodium (a coolant used in fast breeder reactor) Transformer oil Water ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Heat transfer by conduction results due to the transfer of free electrons, kinetic energy & vibrational energy from one molecule to another. Conduction heat transfer can not take place Between two bodies in physical contact with each other Both B & C Between two bodies not in physical contact with each other From one part of a body to the another part of the same body Between two bodies in physical contact with each other Both B & C Between two bodies not in physical contact with each other From one part of a body to the another part of the same body ANSWER DOWNLOAD EXAMIANS APP
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