In screw guage,on the outer surface of this  hollow cylinder, a line ,parallel  to its axis called

Distance between two adjacent threads on a screw gauge is

 When the zero division of Head Scale is above the index line,  the error and correction are :

Let n be the number of the head scale division that coincides with the index line, the corrected head scale reading  in Negative zero error

For negative zero error, the correction and error are :

If the zeroth division of the head scale is below the index line ,the error is said to be

Pitch of the screw x No of revolution made = 

In screw gauge, there are ______________ types of zero errors.

Pitch of the screw is 1 mm. Head scale has 100 divisions. Give the Least Count.

A screw gauge moves 2 mm on 4 head rotations. The head scale is divided into 50 divisions. Give the Least Count.