The least count of steel rule in inch is-

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ISRO SAC Technician B Fitter 6 Nov 2016 Official Paper
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  1. 1/8
  2. 1/16
  3. 1/24
  4. None of above

Answer (Detailed Solution Below)

Option 4 : None of above
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Detailed Solution

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Concept:

Steel Rule

  • It is a straightedge with equally spaced markings along its length.
  • It is used to measure distances or to rule straight lines.
  • It is available in different lengths, the common sizes being 150 mm, 300 mm, and 600 mm.
  • Its reading accuracy (least count) is 0.5 mm or 1/64 inch.​

Important Points 

micrometer may have a least count of 0.01 mm while a Vernier scale on a caliper may have a least count of 0.02 mm.

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