Heat Transfer Which of the following is the most widely used heat insulating material for pipelines carrying steam? 85% magnesia cement and glass wool Tar dolomite bricks followed by asbestos Fireclay refractory followed by aluminium sheet Cotton followed by aluminium foil 85% magnesia cement and glass wool Tar dolomite bricks followed by asbestos Fireclay refractory followed by aluminium sheet Cotton followed by aluminium foil ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Heat transfer efficiency leading of energy conservation in a heat exchanger can be achieved by Enhancing the fluid pumping rate Keeping the heat transfer surface clean Increasing the tube length None of these Enhancing the fluid pumping rate Keeping the heat transfer surface clean Increasing the tube length None of these ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Boiling point of a solution according to Duhring's rule is a linear function of the __________ of water. Boiling point (at the same pressure) Density Viscosity Thermal conductivity Boiling point (at the same pressure) Density Viscosity Thermal conductivity ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Which is the best tube arrangement (in a shell and tube heat exchanger) if the fluids are clean and non-fouling? None of these Triangular pitch Square pitch Diagonal square pitch None of these Triangular pitch Square pitch Diagonal square pitch 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 10 minutes 40 minutes 5 minutes 20 minutes 10 minutes 40 minutes ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Heat transfer rate described by Fourier's law will decrease, if the __________ increases. Thermal conductivity Temperature difference Thickness Heat transfer area Thermal conductivity Temperature difference Thickness Heat transfer area ANSWER DOWNLOAD EXAMIANS APP
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