A pump 260mm suction pipe and a 150mm discharge pipe is used to deliver 98L/s ofwater. The suction gage reads 15.6 kPa vacuum and the discharge gage located 120 cm above the suction gage which reads 110 kPa gage. Find the water power inhp. If the power of the driving motor is 30 Hp, what is the pump efficiency? Answers: 19.84hp, 66%

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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.