When outside micrometer has a negative error, correct reading can be taken by adding the negative error in the actual reading.
14) An outside micrometer has a negative error. The correct reading can be taken by
Adding the negative error in the actual reading
Related Measuring MCQ - Machinist(Set-1) with Answers
50.00 mm
The zero reading (minimum range) of the outside micrometer while measuring with a 50 to 75 mm micrometer is 50 mm.
Dial test indicator
Dial Test Indicator Tools. Also known as a dial indicator or dial gauge, a dial test indicator (DTI) is a device used in various applications where small distances need to be measured accurately, such as checking run out on brake disks or end float on a crankshaft and concentricity of the outside diameter.
Least count
Least Count of an instrument is the smallest measurement that can be taken using an instrument. In other words, it is the smallest change an instrument can measure.
0.5 mm
The spindle of an ordinary metric micrometer has 2 threads per millimetre, and thus one complete revolution moves the spindle through a distance of 0.5 millimetre. The longitudinal line on the sleeve is graduated with 1 millimetre divisions and 0.5 millimetre subdivisions.
Hence Metric outside micrometer has a threaded spindle with a pitch of 0.5 mm