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