A nylon part having a nominal size of 90mm diameter is to be injected molded. Nylon has a shrinkage value of 0.020. The correct size of the outer diameter (to 2 decimal places) for the mold cavity would be (a) 91. 80 mm (b) 91 84 mm (c) 88 20 mm (d) 88 16mm

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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.