For the parallel-pipe system of D=3 in L= 250 ft Fig. each pipe is cast iron, and the pressure drop pi – P2 = 3 lbf/in“. Compute the total flow rate between 1 and 2 if the fluid is SAE 10 oil at 20°C. D=2 in L= 200 ft> --

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Metrology of surface finish

In general terms, the application of scientific principles in the study of measurements is known as metrology. When speaking about measurement, it could be of time, length, microstructures, grain structures, internal crystal discontinuities, surface roughness, measurements of angles, height, width, and so on. While coming to the domain of mechanical engineering, metrology is considered the science of measurements of surface finish, length, surface texture, and angles.