Question 81. The number of kg vaporised per kg of steam fed to the evaporator is defined as

Question 82. Circulation pump is located below the evaporater to

Question 83. Dropwise condensation occurs on __________ surfaces.

Question 84. The absorptivity of a body is equal to its emissivity

Question 85. __________ equation relates the thermal conductivity of a solid to its temperature.

Question 86. In case of heat flow by conduction for a cylindrical body with an internal heat source, the nature of temperature distribution is

Question 87. Thermal conductivity of a conducting solid material depends upon its

Question 88. 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

Question 89. Dropwise condensation of steam on cooling surface is promoted

Question 90. Crystallisation of solids from a homogeneous solution is a/an __________ process.