Question

What is the angle through which
the screw has travelled if before one
round is completed the screw is in the
position shown by O'?

Answer in detail​

Answer 1

Step-by-step explanation:

As shown in first figure the zero error of the screw gauge is:

ZE=

50

5×0.5

=0.05mm

Least count of circular scale =

50

0.5

=0.01mm

Circular scale reading =25×0.01=0.25mm

Main scale reading =2×0.5=1mm

Actual measurement is =MSR+CSR − ZE =1+0.25−0.05=1.20mm

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