Question

If 6 mm is the distance moved by the thimble on the main scale of a screw gauge for 6 rotations, then pitch of the screw is :

• A. 1 mm
• B. 1 cm
• C. 0.1 mm
• D. 0.1 cm

Answer 1

The correct option is A 1 mm

The pitch of a screw gauge is defined as the linear distance moved in main scale for the one complete rotation of circular scale.

Here, 6 rotations give $6mm$ moved distance in main scale.

Thus, one rotation will give the distance of main scale is $6/6=1mm$

Hence , pitch will be $1mm$.