Concept 6 of 8Foundation
Watch on YouTubeVideoMeasuring tools you should know
- Metre scale / ruler — everyday objects.
- Measuring tape — long, flexible; used by tailors, carpenters.
- Vernier calipers — precise to 0.1 mm; for cylinders, small gaps.
- Screw gauge (micrometer) — tiny thicknesses (paper, wire), precise to 0.01 mm.
Example
Thickness of a coin: ruler says ~2 mm. Screw gauge says 1.82 mm. Screw gauge is more precise.
💡 Tip:Never use a ruler if you need 0.1 mm accuracy.
▶Prefer a video? Open YouTube search for “vernier calipers screw gauge class 6”↗🎯 Try it!
5 questions to check what you just read.
0 / 5
- Q1.Best tool for measuring diameter of a thin wire:
- Q2.Measuring tape is best for:
- Q3.Vernier calipers least count:
- Q4.To measure a coin's diameter precisely:
- Q5.Ruler smallest division: