What is the reading of the vernier caliper...

🔍 Key Concepts

• How to read a vernier caliper: first read the main (fixed) scale to the last whole division just to the left of the zero on the sliding vernier scale. • On a typical inch vernier with 25 divisions on the lower scale, each vernier division usually represents 0.001 inch (1 thousandth). • The correct fractional part comes from finding which vernier line lines up exactly with a line on the main scale, then adding that value to the main-scale reading.

💭 Think About

• Look at figure C and decide what the main-scale reading is at the zero mark of the lower vernier scale. Is it a little past 3 inches, or closer to 4 inches? • Count how many vernier divisions from zero you must move until one of the lower lines matches a line on the upper main scale exactly. What thousandths value does that correspond to? • When you add the main-scale inches plus the vernier thousandths, which choice among the answers is consistent with both the main-scale position and the aligned vernier division?

✅ Before You Answer

• Be sure you have identified the last full inch mark to the left of the vernier zero on the main scale. • Verify exactly one vernier line (not two) is perfectly aligned with a main-scale line; that alignment determines the thousandths reading. • Confirm that your final value’s whole-inch part and its three-decimal fractional part both appear in one of the multiple-choice options before selecting.

What is the reading of the vernier caliper scale shown in figure "C" in the illustration? See illustration GS-0092.

3.3750 inch

3.3500 inch

3.4750 inch

4.3750 inch

🔍 Key Concepts

💭 Think About

✅ Before You Answer