Question

The number of circular division on the shown screw
gauge is 100. It moves 0.1 mm on main scale for
one complete rotation and main scale has 1 mm
marks. The diameter of the ball is :-
(1) 4.2 cm (2) 4.22 cm
(3) 4.220 cm (4) 4.2200 cm

Answer 1

Answer

1.20mm

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