# The pitch and the number of divisions, on the circular scale, for a given screw gauge are 0.5 mm and 100 respectively.  When the screw gauge is fully tightened without any object, the zero of its circular scale lies 3 divisions below the mean line.  The reading of the main scale and the circular scale, for a thin sheet, are 5.5 mm and 48 respectively, the thickness of this sheet is: a. 5.755m b. 5.725mm c. 5.740m d. 5.950mm

## Question ID - 50186 | SaraNextGen Top Answer The pitch and the number of divisions, on the circular scale, for a given screw gauge are 0.5 mm and 100 respectively.  When the screw gauge is fully tightened without any object, the zero of its circular scale lies 3 divisions below the mean line.  The reading of the main scale and the circular scale, for a thin sheet, are 5.5 mm and 48 respectively, the thickness of this sheet is: a. 5.755m b. 5.725mm c. 5.740m d. 5.950mm

Answer Key / Explanation : (b) -

LC=

LC=0.5 10−2 mm

+Ve error = 3 0.5 10−2 mm

=1.5 10−2 mm =0.015 mm