Let's solve each of the
metric micrometer reading exercises step by step.
A
metric micrometer measures in millimeters (mm), and the reading is determined by combining:
1.
Main scale (sleeve) reading: The number on the main scale visible before the thimble.
2.
Thimble (rotating sleeve) reading: The number on the thimble that lines up with the reference line.
3.
Vernier scale (if present): Some micrometers have a vernier scale for extra precision, but these appear to be standard ones without it.
The formula:
>
Total Reading = Main Scale Reading + Thimble Reading
Each
division on the thimble represents
0.01 mm, and the
main scale shows whole millimeters and half-millimeter marks.
---
🔍 Step-by-step solution for each:
---
####
1
-
Main scale: 10 mm (the last full mark before the thimble)
-
Thimble: 24 divisions → 24 × 0.01 = 0.24 mm
-
Total: 10 + 0.24 =
10.24 mm
✔ Answer: 10.24 mm
---
####
2
-
Main scale: 15 mm
-
Thimble: 46 divisions → 46 × 0.01 = 0.46 mm
-
Total: 15 + 0.46 =
15.46 mm
✔ Answer: 15.46 mm
---
####
3
-
Main scale: 0 mm (since it's just past 0)
-
Thimble: 38 divisions → 38 × 0.01 = 0.38 mm
-
Total: 0 + 0.38 =
0.38 mm
✔ Answer: 0.38 mm
---
####
4
-
Main scale: 0 mm
-
Thimble: 45 divisions → 45 × 0.01 = 0.45 mm
-
Total: 0 + 0.45 =
0.45 mm
✔ Answer: 0.45 mm
---
####
5
-
Main scale: 1 mm (the first mark after 0)
-
Thimble: 10 divisions → 10 × 0.01 = 0.10 mm
-
Total: 1 + 0.10 =
1.10 mm
✔ Answer: 1.10 mm
---
####
6
-
Main scale: 0 mm
-
Thimble: 27 divisions → 27 × 0.01 = 0.27 mm
-
Total: 0 + 0.27 =
0.27 mm
✔ Answer: 0.27 mm
---
####
7
-
Main scale: 15 mm
-
Thimble: 13 divisions → 13 × 0.01 = 0.13 mm
-
Total: 15 + 0.13 =
15.13 mm
✔ Answer: 15.13 mm
---
####
8
-
Main scale: 0 mm
-
Thimble: 35 divisions → 35 × 0.01 = 0.35 mm
-
Total: 0 + 0.35 =
0.35 mm
✔ Answer: 0.35 mm
---
####
9
-
Main scale: 20 mm
-
Thimble: 20 divisions → 20 × 0.01 = 0.20 mm
-
Total: 20 + 0.20 =
20.20 mm
✔ Answer: 20.20 mm
---
####
10
-
Main scale: 0 mm
-
Thimble: 18 divisions → 18 × 0.01 = 0.18 mm
-
Total: 0 + 0.18 =
0.18 mm
✔ Answer: 0.18 mm
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✔ Final Answers:
| Number | Reading (mm) |
|--------|--------------|
| 1 | 10.24 |
| 2 | 15.46 |
| 3 | 0.38 |
| 4 | 0.45 |
| 5 | 1.10 |
| 6 | 0.27 |
| 7 | 15.13 |
| 8 | 0.35 |
| 9 | 20.20 |
| 10 | 0.18 |
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📌 Tips for Reading Micrometers:
- Always read the
main scale first (whole numbers).
- Then check which
thimble division aligns with the reference line.
- Each thimble division = 0.01 mm.
- If there’s a
half-millimeter mark on the main scale (like at 0.5 mm), include it if visible.
Let me know if you want a diagram or explanation of how the parts work!
Parent Tip: Review the logic above to help your child master the concept of micrometer reading worksheet.
