76. With increase in temperature, the thermal conductivity of most liquids
77. Heat transfer by __________ may not necessarily require the presence of a medium.
78. In a shell and tube type heat exchanger, the floating tube bundle heat arrangement is used
79. Stefan-Boltzman law applies to __________ body.
80. The film co-efficient is decreased due to the presence of non-condensing gases in the vapors. The film co-efficient of superheated vapor as compared to that of saturated vapor is
81. A perfect black body is a perfect __________ of radiation.
82. In case of parallel flow heat exchanger, the lowest temperature theoretically attainable by the hot fluid is __________ the outlet temperature of the cold fluid.
83. The non-dimensional temperature gradient in a liquid at the wall of a pipe is the
84. An equipment which converts the latent or sensible heat of one fluid into the latent heat of vaporisation of another, is called a
85. Which of the following is directly concerned with the heat transfer ?
86. Planck's distribution law is valid for __________ bodies.
87. For hot feed, forward feeding as compared to backward feeding results in __________ economy.
88. Radiation energy is emitted by all the substances, which are above
89. Which one of the following places was famous as a seat of Mahayana learning?
90. What is the steam economy in case of a single effect evaporator system ?
91. If average heat transfer co-efficient is ha and the local coefficient at the end of the plate is hl then in case of heat transfer to a fluid flowing over a flat plate, heated over its entire length
92. jH factor for heat transfer is not a function of the __________ number.
93. The Fourier number (defined as a.t/L2) is used in the analysis of problem involving heat transfer by
94. The energy radiated from a surface Q at absolute temperature T is related as
95. Baffles are provided in heat exchangers to increase the
96. 200 kg of solids (on dry basis) is subjected to a drying process for a period of 5000 seconds. The drying occurs in the constant rate period with the drying rate as, Nc = 0.5 x 10-3 kg/m2.s. The initial moisture content of the solid is 0.2 kg moisture/kg dry solid. The interfacial area available for drying is 4 m2/1000 kg of dry solid. The moisture content at the end of the drying period is (in kg moisture/kg dry solid)
97. In case of a vertical tube evaporator, with increase in the liquor level, the
98. The ratio of total radiating power to the absorptivity of the body depends upon the __________ as per Kirchoffs law.
99. For gases, the thermal conductivity increases with temperature rise. For liquids, with increase in concentration, its thermal conductivity generally