Correct Answer - Option 2 : Setting up dial indicators
Explanation:
Slip gauges or gauge blocks are used as standards for precision length measurement.
These gauges are made in sets and consist of a number of hardened blocks made of high-grade steel with low thermal expansion.
Slip gauges are designated into five grades, namely
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Grade 2
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This is the workshop–grade slip gauges used for setting tools, cutters and checking dimensions roughly on the shop floor.
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Grade 1
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This grade is used for tool room applications for setting up a sine bar, dial indicators, calibration of Vernier, micrometre instruments and so on.
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Grade 0
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This is an inspection-grade slip gauge. Limited people will have access to this slip gauge and extreme care is taken to guard it against rough care.
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Grade 00
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This set is kept in the standards room and is used for inspection/calibration of high precision only. It is also used to check the accuracy of the workshop and Grade 1 slip gauges.
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Calibration Grade
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This is a special grade, with the actual sizes of slip gauges, stated on a special chart supplied by the manufacturer with the set of slip gauges.
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