Civil Engineering Mcqs

Submitted By: Ali Uppal

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  • If a single tube pass heat exchanger is converted to two pass, then for the same flow rate, the pressure drop per unit length in tube side will ________________?
  • A measure of the extent to which viscous heating is important relative to the heat flow resulting from the impressed temperature difference is represented by the _______________ number?
  • The Fourier number (defined as a.t/L2) is used in the analysis of problem involving heat transfer by_______________?
  • Three solid objects of the same material and of equal mass-a sphere, a cylinder (length = diameter) and a cube are at 500°C initially. These are dropped in a quenching bath containing a large volume of cooling oil each attaining the bath temperature eventually. The time required for 90% change in temperature is the smallest for_________________?
  • Which of the following forced convection heat transfer equation accounts for the liquid viscosity effect for viscous liquids ?

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