Civil Engineering Mcqs


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  • Minimum recommended baffle spacing in a shell and tube heat exchanger is about (where, D = shell diameter)?
  • Tube expansion allowances exist in _____________ heat exchanger?
  • Multiple effect evaporation accounts for___________________?
  • If heat transfer rate varies with the time, it is termed as__________________?
  • The inner wall of a furnace is at a temperature of 700°C. The composite wall is made of two substances, 10 and 20 cm thick with thermal conductivities of 0.05 and 0.1 W.m-1.°C- 1 respectively. The ambient air is at 30°C and the heat transfer co-efficient between the outer surface of wall and air is 20 W.m-2.°C-1. The rate of heat loss from the outer surface in W.m-2is__________________?

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