Which of the following is incorrect about micrometers?

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Option C: The graduated surface diameter of the barrel should be 5 mm

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Practice and solve "Which of the following is incorrect about micrometers?..." for Electrical - Measurement & Instrumentation. The correct answer is Option C: The graduated surface diameter of the barrel should be 5 mm. Detailed step-by-step solution, conceptual clarity, and formulas on Examoogle.

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Option A: Thimble and barrel should have a dull finish

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Option B: Total travel of the measuring spindle is called measuring range

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Option D: screw has 10 or 20 threads per cm

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