RT Family

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  1. The single-wall technique is preferred, but requires what?
    Access to both sides of the component
  2. The double -wall technique with single-wall viewing requires at minimum XXX shots for 360° coverage of a circumferential weld?
  3. The double-wall technique with double-wall viewing requires at least XXX shots for 360° coverage of a circumferential weld?
  4. The double-wall technique is limited to outside diameters of?
    ≤3.5" (3 NPS)
  5. Hole type IQIs are normally placed where?
    Next to the weld, parallel to it.
  6. Wire type IQIs are placed where?
    On the weld with the wires perpendicular to the weld.
  7. If a shim is used under a hole-type IQI, how many sides of the IQI should be visible in the RT?
  8. If an IQI is placed on the film side, which lead letter should be placed near the IQI?
  9. What is the film density range for the IQI and weld?
  10. When a hole-type IQI is used, which hole should be visible in the radiograph?
  11. A faint light "B" is an indication of what?
    Unacceptable backscatter radiation
  12. How often should densitometers be calibrated?
    At least every 90 days
  13. The density in a radiograph in the area of interest shall not vary by more than what percentages? (range)
    Minus 15% and plus 30%

    For example, the IQI film density measured at 3.0; the minimum density in the weld is 2.55 and the maximum density in the weld is 3.90.
  14. IQI's selected should share what characteristics to the material being RT'd?
    • Similar alloy material group or grade.
    • Similar density.
  15. How many IQIs are required for a single exposure? Ex: RT source in center of shell and will x-ray 100% of the circ weld in one exposure.
    3 IQIs minimum spaced 120° apart.
Card Set:
RT Family
2017-09-03 14:22:50

Sect V/VIII Questions
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