11. The main function of baffles provided in a shell and tube heat exchanger is to
12. The maximum heat transfer co-efficient from steam heating will be attained when the steam is
13. The rate of emission of radiation by a body does not depend upon the
14. In a multiple effect evaporator, the effect of boiling point elevation is to
15. Which of the following is concerned with both heat and mass transfer?
16. The ratio of kinematic viscosity to thermal diffusivity is called the __________ number.
17. (NGr × NPr) is called the __________ number.
18. h.D/K is called the __________ number.
19. A fluid is flowing inside the inner tube of a double pipe heat exchanger with diameter 'd'. For a fixed mass flow rate, the tube side heat transfer co-efficient for turbulent flow conditions is proportional to
20. The thermal radiative flux from a surface of emissivity = 0.4 is 22.68 kW/m2. The approximate surface temperature (K) is
(Stefan-Boltzman constant = 5.67 × 10-8 W/m2.K4)
(Stefan-Boltzman constant = 5.67 × 10-8 W/m2.K4)
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