METRIC MICROMETER READING EXERCISES 2 5 10 15 20 3 5 6 5 8 10 15 30 | 10 10 15 20 | LIFE
The Correct Answer and Explanation is :
Reading a metric micrometer involves interpreting measurements from its sleeve and thimble scales. Here’s a step-by-step guide to understanding the readings:
1. Sleeve Scale:
- Whole Millimeters: The bottom row of the sleeve displays whole millimeter graduations. Count the number of whole millimeter divisions visible to determine the whole millimeter value.
- Half Millimeters: The top row indicates half-millimeter increments. If a line from the top row aligns with a line from the bottom row, it represents an additional 0.5 millimeters.
2. Thimble Scale:
- The thimble rotates around the sleeve and is graduated into 50 equal divisions, each representing 0.01 millimeters. To read the thimble scale:
- Identify the line on the thimble that aligns with the index line on the sleeve.
- Multiply the number of aligned divisions by 0.01 mm to determine the thimble reading.
3. Vernier Scale (if present):
- Some micrometers include a vernier scale for enhanced precision, allowing measurements to the nearest 0.002 mm. To use the vernier scale:
- Look for the line on the vernier scale that aligns with any line on the thimble scale.
- The number of aligned divisions, multiplied by 0.002 mm, gives the vernier reading.
Example:
Consider a micrometer with the following readings:
- Sleeve Scale: 15 whole millimeters and 1 half-millimeter (15.5 mm).
- Thimble Scale: 20 divisions aligned (20 × 0.01 mm = 0.20 mm).
- Vernier Scale: 3 divisions aligned (3 × 0.002 mm = 0.006 mm).
Total Measurement: 15.5 mm (sleeve) + 0.20 mm (thimble) + 0.006 mm (vernier) = 15.706 mm.
For practice, online simulators can be beneficial. The Metric Micrometer Game offers interactive exercises to enhance your skills in reading metric micrometers.
Regular practice with these tools can improve your proficiency in using micrometers for precise measurements.