Inspection Techniques & Nondestructive Testing Flashcards
7 cards from real API 510 practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 Inspection Techniques & Nondestructive Testing flashcards as text
When performing ultrasonic thickness measurements on a vessel with internal corrosion, which scanning pattern best characterizes the corrosion profile?
Answer: Grid scanning at regular intervals across the affected area
Grid scanning at regular intervals provides a systematic map of metal loss, identifying minimum thickness and corrosion patterns across the affected area.
Magnetic particle testing (MT) is limited in its application to pressure vessels primarily because it:
Answer: Is only applicable to ferromagnetic materials
MT relies on magnetic flux leakage and is therefore restricted to ferromagnetic materials such as carbon steel, excluding austenitic stainless steels and nonferrous alloys.
During a liquid penetrant test (PT), what is the purpose of the developer?
Answer: To draw the penetrant back out of discontinuities for visual detection
The developer blots penetrant out of discontinuities through capillary action, creating a visible indication against the contrasting background.
According to API 510, when is a Thickness Measurement Location (TML) plan most critical?
Answer: As part of setting up an inspection program to track corrosion rates over time
TML plans are essential for establishing baseline thickness readings and tracking corrosion rates over successive inspections to predict remaining life.
Radiographic testing (RT) of a pressure vessel weld reveals a linear indication parallel to the weld axis. This is most likely:
Answer: Incomplete fusion or lack of penetration
Linear indications aligned with the weld axis are characteristic of incomplete fusion or lack of penetration, which are planar discontinuities that appear as straight dark lines on radiographs.
Acoustic emission testing (AET) is best suited for which inspection scenario on pressure vessels?
Answer: Monitoring active crack growth during a pressure test
AET detects the elastic waves released by active flaw growth, making it ideal for monitoring crack propagation in real time during pressurization.
When using shear wave ultrasonic testing to inspect a pressure vessel weld, the sound beam angle is selected primarily to:
Answer: Direct the beam perpendicular to the expected flaw orientation
The beam angle is chosen so the sound strikes the most probable flaw orientation (typically perpendicular to it) to achieve maximum reflectivity and detection sensitivity.