51. For flow over a flat plate, the ratio of thermal boundary layer thickness, 'xt' and hydrodynamic boundary layer thickness 'x' is equal to (where, NPr = Prandtl number)
52. The critical radius 'r' of insulation on a pipe is given by
53. Heat transfer efficiency leading of energy conservation in a heat exchanger can be achieved by
54. Which of the following is the most controlling factor for the rate of bubble detachment from the hot solid surface?
55. Leidenfrost point is a term concerned with the
56. The unit of conductance in SI unit is
57. With increase in the distance between the heat source and the object receiving the heat, the radiation heat transfer
58. Fluid motion in the natural convection heat transfer between a solid surface and a fluid in contact with it, results from the
59. For a multipass shell and tube heat exchanger, the LMTD correction factor is always
60. The energy radiated from a surface Q at absolute temperature T is related as
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