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Engineering Metrology (22342)
Unit-II
Standards and Comparators
Q. Define – Standards. What are its types?
In order to make measurements a meaningful exercise, some sort of comparison with a
known quantity is very essential. It is necessary to define a unit value of any physical
quantity under consideration such that it will be accepted internationally. It is not
sufficient to only define these unit values of physical quantities; these should also be
measureable.
A standard is defined as the fundamental value of any known physical quantity, as
established by national and international organizations of authority, which can be
reproduced. Fundamental units of physical quantities such as length, mass, time, and
temperature form the basis for establishing a measurement system.
Standards play a vital role for manufacturers across the world in achieving consistency,
accuracy, precision, and repeatability in measurements and in supporting the system
that enables the manufacturers to make such measurements.
Engineering Metrology (Only For Personal Use) 1
