1. If the thermal conductivity of a wall material is independent of temperature, the steady state temperature distribution in the very large thin plane wall having steady, uniform surface tempeature follows __________ law.
2. In a single effect evaporator, the economy is
3. Fruit juice (a heat sensitive material) can be concentrated in a __________ evaporator.
4. Film condensation is promoted on a/an __________ surface.
5. Dropwise condensation is promoted on a/an __________ surface.
6. In a backward feed multiple effect evaporator
7. Which type of heat exchanger is preferred for heavy heat loads?
8. A steel sphere of radius 0.1 m at 400°K is immersed in an oil at 300°K. If the centre of the sphere reaches 350°K in 20 minutes, how long will it take for a 0.05 m radius steel sphere to reach the same temperature (at the centre) under identical conditions ? Assume that the conductive heat transfer co-efficient is infinitely large.
9. Boiling point elevation of an ideal solution
10. The ratio of velocity head to tube side return loss in case of a multipass shell and tube heat exchanger is
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