General Studies · Metrology and Precision Measurement
Which of the following instruments is used for precise angular measurement in metrology and is capable of measuring angles to within a few seconds of arc?
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 1Vernier Bevel Protractor
- 2Autocollimator✓
- 3Sine Bar with Dial Indicator
- 4Optical Comparator
Correct answer
Autocollimator
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