Question

Read the screwgauge
Main scale has $\frac{1}{2}$ mm marks.
Circular scale has 50 division
In complete rotation, the screw advances by $\frac{1}{2}$mm

• A. 6.093 mm `
• B. 6.93 mm
• C. 69.30 mm
• D. .693 mm

Answer 1

The correct option is B 6.93 mm

Object thickness = 6.5 .....
Object thickness = 6.5 mm + 43 $(\frac{1/2mm}{50})$
= 6.93 mm