What is vernier calliper  ? ...... 

Vernier calliper is defined as a measuring tool   is use to measure inner dia , outer dia and depth of any object. 

What is Least count of vernier calliper? 

Least count of vernier calliper is defined as the minimum distance that can be measured from the vernier calliper

Least count for vernier calliper is -0. 02mm

Main parts of th vernier calliper? 

1 main jaws

2 smaller jaws

2 knob

3  locking nut

4 depth gauge

5 main scale 

6 vernier scale

How to measure from vernier calliper

1 we measure inner diameter

  So we use smaller jaws to measure inner diameter

Process shown below in figure

Inner diameter measurement process

2 we measure outer diameter

 By two major jaw

Reading is ={ 89 + (0.02× 32) }= 89.64mm

3 depth measure ment by depth prove