71. According of Kirchhoff's law
72. Thermal conductivity of wood depends on
73. The rate of energy emission from unit surface area through unit solid angle, along a normal to the surface, is known as
74. Which of the following is the case of heat transfer by radiation?
75. The ratio of the energy absorbed by the body to total energy falling on it is called
76. Sensible heat factor is given by (where SHR = Sensible Heat Ratio and LHR = Latent Heat Ratio)
77. LMTD in case of counter flow heat exchanger as compared to parallel flow heat exchanger is
78. The automobile radiator is a heat exchanger of
79. A grey body is one whose absorptivity
80. In free convection heat transfer transition from laminar to turbulent flow is governed by the critical value of the
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