Online test on Mech.Engg.measurement (MEM)

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MAN 22509/ Unit-1 Practice test (MCQ)

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Engineering Metrology notes Unit 1.1

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Unit 1  1.1           Definition of Metrology, Objectives  Important points:  ·                Need of measurement:          Measurement is necessary for 1.     To know unknown physical quantity. 2.     To compare dimensions of components. 3.     To assure that the product is manufactured as per the drawing / specifications. 4.        To detect errors in manufacturing. 1.1 Definition of Metrology : Metrology is defined as “science of measurement” which is concerned with methods of measurement based on agreed units and standards. According to International Bureau of Weights and Means (BIPM) as “the science of measurement embracing both experiment and theoretical determinations measures at any level of uncertainty in the  field of science and technology”. 1.1.1    Objectives of Metrology : 1.      Selection of appropriate measurements instrument:          There are various measuring parameters of product / components. Hence selection of proper                    instrument is necessary.
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