Civil Engineering Mcqs

Submitted By: Ali Uppal

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  • A wall has two layers of materials A and B; each made of a different material. Both the layers have the same thickness. The thermal conductivity of material A is twice that of B. Under the equilibrium, the temperature difference across the wall is 36°C. The temperature difference across the layer A is ______________ °C?
  • Temperature profile in steady state heat transfer is________________?
  • Maximum water velocity in tubes of a 1-2 shell and tube heat exchanger may be around _____________ metres/second?
  • A tank painted with which of the following coloured paints, would heat up maximum by radiation from sun ?
  • The left face of a one dimensional slab of thickness 0.2 m is maintained at 80°C and the right face is exposed to air at 30°C. The thermal conductivity of the slab is 1.2 W/m.K and the heat transfer co-efficient from the right face is 10 W/m2.K. At steady state, the temperature of the right face in °C is____________________?

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