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The diagram shows part of a micrometer screw gauge. What is the reading shown?
- A 5.31 mm
- B 6.23 mm
- C 5.81 mm
- D 6.31 mm
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The reading shown on the micrometer screw gauge is 5.81 mm. This can be determined by looking at the position of the thimble and the main scale. The thimble is between the 5 and 6 mark on the main scale, and the line on the thimble is aligned with the 0 mark on the main scale. The number on the thimble that aligns with the main scale is 8, indicating a measurement of 0.08 mm. Adding this to the measurement on the main scale (5.73 mm) gives a total reading of 5.81 mm.