🔍 Key Concepts

• How to read the sleeve scale (main horizontal scale) on an inch micrometer in thousandths of an inch • How to read the thimble scale (rotating vertical scale) and add it to the sleeve reading • Ensuring you include any visible half‑turn (0.025 in) marks on the sleeve if present

💭 Think About

• First, from figure III, determine how many full hundredths of an inch are clearly visible to the left of the thimble edge on the sleeve scale • Next, decide which line on the thimble scale lines up exactly with the horizontal reference line on the sleeve, and convert that to thousandths of an inch • Finally, add the sleeve reading and the thimble reading together and compare that total to the answer choices

✅ Before You Answer

• Be sure the micrometer zero is understood: one full revolution of the thimble usually equals 0.025 inch • Confirm whether a 0.025 or 0.050 half‑mark has just passed the reference line on the sleeve and include it in your base reading • Double‑check that the thimble line you’re using is the one that aligns exactly with the sleeve’s center line before choosing among the options