If a micrometer's circular-scale zero is below the reference line when closed, its zero error is:

  • A Positive and subtracted
  • B Negative and subtracted
  • C Positive and added
  • D Absent
Correct Answer: Option A — Positive and subtracted
Explanation:
A zero below the line gives an excessive reading, so the error is positive and subtracted.
Submitted by: PaperMCQs
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