Which option corresponds to the method used for internal inspection of an assembled turbine?

Which option corresponds to the method used for internal inspection of an assembled turbine?

• A. Borescope
• B. Endoscope
• C. 3
• D. Dye Penetrant

Answer: (C)

Inspecting the interior of an assembled turbine requires a tool that can reach into tight spaces and give a clear view without taking the machine apart. A borescope is designed for this purpose: it’s a small-diameter viewing instrument with its own light source that can be inserted through access ports to visually inspect internal components like blades, passages, and liners. This allows detection of wear, cracks, or deposits while the turbine remains assembled. An endoscope, while similar in concept, is typically used for medical contexts or different industrial applications and isn’t optimized for the harsh engine environment or geometry of turbine components. Dye penetrant is a surface-inspection method that reveals surface-breaking defects only after applying dye and developing it on accessible surfaces; it can’t reveal hidden internal features. The numeral option does not describe an inspection method at all.

Inspecting the interior of an assembled turbine requires a tool that can reach into tight spaces and give a clear view without taking the machine apart. A borescope is designed for this purpose: it’s a small-diameter viewing instrument with its own light source that can be inserted through access ports to visually inspect internal components like blades, passages, and liners. This allows detection of wear, cracks, or deposits while the turbine remains assembled. An endoscope, while similar in concept, is typically used for medical contexts or different industrial applications and isn’t optimized for the harsh engine environment or geometry of turbine components. Dye penetrant is a surface-inspection method that reveals surface-breaking defects only after applying dye and developing it on accessible surfaces; it can’t reveal hidden internal features. The numeral option does not describe an inspection method at all.