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What is a T-Shaped, spring-loaded tool that uses opposing shafts to measure an opening?

  1. Caliper

  2. Depth Gauge

  3. Telescoping Gauge

  4. Inspection Tool

The correct answer is: Telescoping Gauge

The tool described as T-shaped, spring-loaded, and using opposing shafts to measure an opening is accurately identified as a telescoping gauge. This tool is specifically designed to measure internal dimensions, like the diameter of a hole or the width of a slot. When the opposing shafts of the gauge are manipulated to fit into the opening being measured, they expand and the spring mechanism holds them in place. This allows for a precise measurement, which can then be transferred to a measuring tool like a micrometer or caliper for an accurate reading. While calipers are indeed used for measuring various dimensions, they do not possess the unique T-shaped design and spring-loaded mechanism described in the question. A depth gauge is typically used for measuring the depth of holes or recesses, and while it is a valuable tool, it does not fit the description provided. Lastly, an inspection tool is a broad category that can include many devices used in quality control or measurement, but it does not specifically describe the tool in question.