71. Economy of a multiple effect evaporator depends upon the
72. In a forward feed multiple effect evaporator, the pressure is
73. Heat produced when a steady state current, $$I$$ passes through an electrical conductor having resistance, 'R' is
74. In case of heat transfer by conduction in a hollow cylinder, __________ mean area is used to calculate the heat transfer rate.
75. The most conducive surface for dropwise condensation to occur is the __________ surface.
76. The non-dimensional temperature gradient in a liquid at the wall of a pipe is the
77. Correction is applied to LMTD for __________ flow.
78. The range of electromagnetic spectrum important in heat transfer by radiation is __________ microns.
79. A black body does not __________ radiation.
80. Which is the best tube arrangement (in a shell and tube heat exchanger) if the fluids are clean and non-fouling?
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