🔍 Key Concepts

• How to read a standard inch micrometer (sleeve scale + thimble scale) • What each small line on the sleeve represents in thousandths of an inch • How many thousandths each division on the thimble represents when it lines up with the reference line

💭 Think About

• First, look only at the sleeve (barrel) scale on micrometer A. How many full 0.025" increments are clearly visible to the left of the thimble edge? • Next, look at which line on the thimble scale exactly aligns with the horizontal reference line on the sleeve. How many thousandths of an inch does that represent? • Add the sleeve reading and the thimble reading together. Which choice matches that total in thousandths of an inch?

✅ Before You Answer

• Be sure you know that on a typical inch micrometer each sleeve major mark = 0.025 inch and each thimble division = 0.001 inch • Verify the thimble edge: do NOT count any 0.025" increment that is partially covered by the thimble—only those fully visible to the left • Double-check that you are reading figure A only, not B or C, and that you are matching your final number to the decimal places in the answer choices (thousandths of an inch)