121. Vacuum is generally maintained in the vapour space of an evaporator mainly to
122. Prandtl and Reynold's analogies are identical for Prandtl number value of
123. In case of vertical tube evaporator, with increase in liquor level, the overall heat transfer co-efficient
124. Dietus-Boelter equation cannot be used for molten metals mainly due to its very low
125. A hollow sphere and a solid sphere of the same material and equal radii are heated to the same temperature. In this case,
126. Pick out the wrong statement.
127. An ejector is used to
128. An insulator should have
129. Shell side pressure drop in a shell and tube heat exchanger does not depend upon the
130. For large heat transfer area requirement, shell and tube heat exchanger is preferred, because it
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