A. Vernier Callipers
B. Sealer Gauge
C. Bore Gauge
D. Feeler Gauge
🧠 Explanation:
Vernier callipers measure a test tube’s internal diameter with high precision, used in labs and engineering. This tool is a key topic in physics and technical education, engaging students and professionals studying accurate measurement techniques. Understanding vernier callipers ensures reliable data in experiments and manufacturing, making it relevant for those exploring scientific tools and their applications in research, quality control, and design processes across industries.
