A micrometer has a positive error of 0.02 mm. What is the correct reading when the micrometer measures 25.41 mm ?

28) A micrometer has a negative error of 0.03 mm. What is the correct reading when the micrometer measures 40.53 mm ?

29) Zero error of a 50 - 75 mm outside micrometer can be checked with

30) The value of the smallest division on sleeve of a metric outside micrometer is

31) The value of one division on bevel edge of the thimble of a metric outside micrometer is