What is a borescope?

What is a borescope?

• A. An illumination or optical instrument for seeing the inside of a tight structure, or for seeing through a small hole
• B. An instrument used to measure temperature
• C. A tool for tightening fasteners
• D. A camera used only for exterior inspection

Answer: (A)

A borescope is an illumination or optical instrument designed to let you see into tight spaces or through small openings. It usually consists of a slender tube—rigid or flexible—with a lens at the tip and a light source to illuminate the area. This setup lets you inspect hidden areas, such as the inside of an engine, a turbine, or a pipe, without disassembling parts. Some versions also connect to a camera or video display to make viewing easier. The other options don’t fit because one describes a device for measuring temperature, another is a tool for tightening fasteners, and the last refers to a camera used only for exterior inspection. None of those capture the purpose of viewing internal spaces through a small opening like a borescope does.

A borescope is an illumination or optical instrument designed to let you see into tight spaces or through small openings. It usually consists of a slender tube—rigid or flexible—with a lens at the tip and a light source to illuminate the area. This setup lets you inspect hidden areas, such as the inside of an engine, a turbine, or a pipe, without disassembling parts. Some versions also connect to a camera or video display to make viewing easier.

The other options don’t fit because one describes a device for measuring temperature, another is a tool for tightening fasteners, and the last refers to a camera used only for exterior inspection. None of those capture the purpose of viewing internal spaces through a small opening like a borescope does.