Zero error in micrometer occurs when zero on the thimble and datum line on sleeve do not coincide when measuring faces are in contact.
19) Zero error in micrometer means
Zero on thimble and datum line on sleeve do not coincide when measuring faces are in contact
Related Measuring MCQ - Machinist(Set-1) with Answers
Lock the reading after setting it over the workpiece
The lock nut is simply a quarter turn nut that locks the spindle from turning. The sleeve contains the scale which is used to determine the measurement and the internal threads which allow the spindle to move.
Nut & bolt
The working principle of the Micrometer is based on screw and nut. (Rotational moment to linear moment) As we know as the screw rotates one revolution on the screw, then the screw moves linearly by one pitch distance
Vernier bevel protractor
Vernier bevel protractor is used to accurately measure the angle of taper
Least count of Vernier Caliper is 0.02 mm