In immersion testing, what term describes the accessory equipment to which the search cable and unit are attached?

In immersion testing, what term describes the accessory equipment to which the search cable and unit are attached?

• A. Crystal collimator
• B. Scrubber
• C. Jet stream unit
• D. Search tube or scanning tube

Answer: (D)

In immersion testing, the accessory that the search cable and unit attach to is the search tube or scanning tube. This tube acts as a protective housing for the transducer and defines the water path between the probe and the test surface, giving a stable, repeatable interface for scanning. It keeps the transducer properly oriented and maintains the correct standoff, which is essential for consistent coupling and reliable measurements. Other items listed don’t describe the assembly used to connect the probe in immersion UT—the crystal collimator is associated with radiography concepts, and scrubber or jet stream unit refer to different equipment not tied to attaching the search cable to the probe.

In immersion testing, the accessory that the search cable and unit attach to is the search tube or scanning tube. This tube acts as a protective housing for the transducer and defines the water path between the probe and the test surface, giving a stable, repeatable interface for scanning. It keeps the transducer properly oriented and maintains the correct standoff, which is essential for consistent coupling and reliable measurements. Other items listed don’t describe the assembly used to connect the probe in immersion UT—the crystal collimator is associated with radiography concepts, and scrubber or jet stream unit refer to different equipment not tied to attaching the search cable to the probe.