Which non-destructive testing methods are common options for post-weld quality assurance?

Which non-destructive testing methods are common options for post-weld quality assurance?

• A. Radiography (RT) and Ultrasonic Testing (UT).
• B. Magnetic compass and ruler check.
• C. Vibration testing.
• D. Destructive testing only.

Answer: (A)

Post-weld quality assurance relies on non-destructive testing methods that inspect welds without damaging the part. Radiography uses X-rays or gamma rays to create an image of the weld and surrounding material, so hidden cracks, porosity, or lack of fusion show up clearly. Ultrasonic testing sends high-frequency sound into the weld and listens for echoes; flaws disrupt the sound path and also lets inspectors gauge weld thickness and depth of defects. Together, these two cover internal features and flaw sizing and are widely specified in welding codes, making them common, dependable options for verifying weld integrity after fabrication. The other options don’t fit as standard post-weld nondestructive inspections. A magnetic compass and ruler check isn’t a recognized flaw-detection method for welds. Vibration testing isn’t a direct, reliable way to detect common weld discontinuities. Destructive testing isn’t nondestructive, so it isn’t used for post-weld quality assurance on finished parts.

Post-weld quality assurance relies on non-destructive testing methods that inspect welds without damaging the part. Radiography uses X-rays or gamma rays to create an image of the weld and surrounding material, so hidden cracks, porosity, or lack of fusion show up clearly. Ultrasonic testing sends high-frequency sound into the weld and listens for echoes; flaws disrupt the sound path and also lets inspectors gauge weld thickness and depth of defects. Together, these two cover internal features and flaw sizing and are widely specified in welding codes, making them common, dependable options for verifying weld integrity after fabrication.

The other options don’t fit as standard post-weld nondestructive inspections. A magnetic compass and ruler check isn’t a recognized flaw-detection method for welds. Vibration testing isn’t a direct, reliable way to detect common weld discontinuities. Destructive testing isn’t nondestructive, so it isn’t used for post-weld quality assurance on finished parts.