The process of heat transfer from one particle of the fluid to another by the actual movement of the fluid particles caused by some mechanical means, is known as
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Mechanical Engineering · all questionsHeat And Mass Transfer
Heat And Mass Transfer
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Joule sec is the unit of
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Which of the following statement is correct?
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The ratio of the emissive power and absorptive power of all bodies is the same and is equal to the emissive power of a perfectly black body. This statement is known as
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In free convection heat transfer, Nusselt number is function of
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In regenerator type heat exchanger, heat transfer takes place by
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Heat flows from one body to other when they have
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The ratio of the thickness of thermal boundary layer to the thickness of hydrodynamic boundary layer is equal to (Prandtl number) n, where n is equal to
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Which of the following would lead to a reduction in thermal resistance?
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Heat transfer in liquid and gases takes place by
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According of Kirchhoff's law
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Thermal conductivity of wood depends on
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The rate of energy emission from unit surface area through unit solid angle, along a normal to the surface, is known as
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Which of the following is the case of heat transfer by radiation?
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The ratio of the energy absorbed by the body to total energy falling on it is called
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Sensible heat factor is given by (where SHR = Sensible Heat Ratio and LHR = Latent Heat Ratio)
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LMTD in case of counter flow heat exchanger as compared to parallel flow heat exchanger is
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The automobile radiator is a heat exchanger of
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A grey body is one whose absorptivity
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In free convection heat transfer transition from laminar to turbulent flow is governed by the critical value of the
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