Heat Transfer The advantage of using a 1 - 2 shell and tube heat exchanger over a 1 - 1 shell and tube heat exchanger is Lower tube side pressure drop Lower shell side pressure drop Higher tube side heat transfer co-efficient Higher shell side heat transfer co-efficient Lower tube side pressure drop Lower shell side pressure drop Higher tube side heat transfer co-efficient Higher shell side heat transfer co-efficient ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer The variation of thermal conductivity of a metal with temperature is often correlated using an expression of the form K = K₀ + at. where, K is the thermal conductivity and T is the temperature (in °K). The units of 'a' in SI system will be W/m None, A is just a number W/m.k² W/m.k W/m None, A is just a number W/m.k² W/m.k ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer For large heat transfer area requirement, shell and tube heat exchanger is preferred, because it Is more economical Occupies smaller space All of these Is easy to operate and maintain Is more economical Occupies smaller space All of these Is easy to operate and maintain ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer 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. 5 minutes 20 minutes 40 minutes 10 minutes 5 minutes 20 minutes 40 minutes 10 minutes ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Fourier's law of heat conduction applies to __________ surfaces. Non-isothermal Isothermal Neither A and B Both A and B Non-isothermal Isothermal Neither A and B Both A and B ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer The purpose of providing a 'catchall' in the vapor line of an evaporator is to Regulate the vapor flow Create vacuum Vent the non-condensible gases Arrest the entrained liquid Regulate the vapor flow Create vacuum Vent the non-condensible gases Arrest the entrained liquid ANSWER DOWNLOAD EXAMIANS APP
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