Civil Engineering Mcqs

Submitted By: Ali Uppal

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  • A long iron rod initially at a temperature of 20°C has one end dipped in boiling water (100°C) at time, t = 0. The curved surface of the rod is insulated so that heat conduction is one dimensional in the axial direction. The temperature at a distance 100 mm from the dipped end becomes 40°C at time, t = 200 s. The same temperature is achieved at a distance of 200 mm from the dipped end at time ___________________?
  • Value of Prandtl number for water ranges from_________________?
  • For a fluid flowing in an annulus space, the wetted perimeter for heat transfer and pressure drop are__________________?
  • 1000 kg of wet solids are to be dried from 60% to 20% moisture (by weight). The mass of moisture removed in kg is__________________?
  • Heat transfer efficiency leading of energy conservation in a heat exchanger can be achieved by____________________?

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