Question

The diagram below shows a section of a micrometer screw gauge.
          

1. State the smallest measurement that can be made by the measurement that can be made by the micrometer screw gauge. 
2. What is the correct reading of the micrometer screw gauge if it has an error of 0.25cm 

Answer 1

1. 1/100mm or 0.01mm
2. Initials reading =16.32mm
   0.25cm=2.5mm
   Diameter=16.32−2.5=13.82mm