EXAMIANS
Film boiling occurs at __________ pressure.
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For turbulent flow in a tube, the heat transfer co-efficient is obtained from the Dittus-Boelter correlation. If the tube diameter is halved and the flow rate is doubled, then the heat transfer co-efficient will change by a factor of
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The Graetz number is concerned with the
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A composite wall consists of two plates A and B placed in series normal to the flow of heat. The thermal conductivities are kA and kB and the specific heat capacities are CPA and CPB for plates A and B respectively. Plate B has twice the thickness of plate A. At steady state, the temperature difference across plate A is greater than that across plate B, when
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A steel sphere of radius 0.1 m at 400°K is immersed in an oil at 300°K. If the centre of the sphere reaches 350°K in 20 minutes, how long will it take for a 0.05 m radius steel sphere to reach the same temperature (at the centre) under identical conditions ? Assume that the conductive heat transfer co-efficient is infinitely large.
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Which is the best tube arrangement (in a shell and tube heat exchanger) if the fluids are clean and non-fouling?
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Which of the following accessories is provided in the vapor line of an evaporator for removing the entrained liquid ?
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In a co-current double pipe heat exchanger used for condensing saturated steam over the inner tube, if the entrance and exit conditions of the coolant are interchanged, then the rate of condensation will
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In a shell and tube type heat exchanger, the floating tube bundle heat arrangement is used
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Nusselt number is the ratio of the temperature gradient at the wall to
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