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Mr. Dubey • 52.26K Points
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Q. Which standard is fixed and used for industrial laboratories?

(A) international standard
(B) primary standard
(C) secondary standard
(D) working standard
Correct : Option (C)

Explanation: 
 secondary standards are fixed and used in industrial laboratories. working standards as its name suggests is used for day to day measurements. international standards are accepted internationally and primary standards are used in different parts of world which will not be accessible outside for calibration.

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