What can a borescope or fiberscope be used for?

A borescope or fiberscope is primarily designed for visual inspection of internal components, making it an essential tool in maintenance and diagnostics. These instruments allow technicians to examine areas that are otherwise difficult or impossible to access, such as the interiors of machinery or engines, without disassembling them. This inspection capability is crucial in identifying wear, damage, or other issues within components, thereby facilitating timely maintenance and preventing more severe problems.

Other options, while they describe important maintenance activities, are not functions served by a borescope or fiberscope. For instance, measuring temperature requires specific temperature sensors rather than visual inspection tools, while calibrating equipment settings necessitates precision instruments that can provide specific measurements and adjustments. Identifying the source of noise typically involves auditory evaluation and perhaps the use of specialized sound detection equipment, rather than visual inspection. This specificity of purpose highlights why option B is the most accurate representation of the function of a borescope or fiberscope.