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Q.

The pitch of a screw is 1mm and there are 100 divisions on the circular scale. In measuring the diameter of a sphere there are six divisions on the linear scale and forty divsions on circular scale coincide with the reference line. Find the diameter of the sphere.

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a

6.4mm

b

4.6mm

c

6mm

d

0.4mm

answer is A.

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Detailed Solution

LC=1100=0.01mm Total reading =MSR+CSR(LC)=61+40×0.01=6.4mm
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