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The circular scale of a screw gauge has 50 divisions and pitch of 0.5 ~mm . Find the diameter of sphere. Main scale reading is 2 .

Options

  1. A1.2
  2. B1.25
  3. C2.20
  4. D2.25

Correct answer

A. 1.2

Step-by-step solution

Least count LC = Pitch Number of divisions on circular scale = 0.1 50 =0.01 ~mm Now, diameter of ball =(2 0.5 ~mm )+(25-5)(0.01)=1.2 ~mm

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