61. The number of kg vaporised per kg of steam fed to the evaporator is defined as
62. Circulation pump is located below the evaporater to
63. Dropwise condensation occurs on __________ surfaces.
64. The absorptivity of a body is equal to its emissivity
65. __________ equation relates the thermal conductivity of a solid to its temperature.
66. In case of heat flow by conduction for a cylindrical body with an internal heat source, the nature of temperature distribution is
67. Thermal conductivity of a conducting solid material depends upon its
68. A 10 cm dia steam pipe, carrying steam at 180°C, is covered with an insulation (conductivity = 0.6 W/m.°C). It losses heat to the surroundings at 30°C. Assume a heat transfer co-efficient of 0.8 W/m2.°C for heat transfer from surface to the surroundings. Neglect wall resistance of the pipe and film resistance of steam. If the insulation thickness is 2 cms, the rate of heat loss from this insulated pipe will be
69. Dropwise condensation of steam on cooling surface is promoted
70. Crystallisation of solids from a homogeneous solution is a/an __________ process.
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