Describe the difference between radiographic testing and ultrasonic testing.

Describe the difference between radiographic testing and ultrasonic testing.

• A. Radiographic testing uses X-ray/gamma to view internal features; ultrasonic testing uses sound waves to detect flaws and measure thickness
• B. Radiographic uses sound waves; ultrasonic uses X-rays
• C. Radiographic uses magnetic fields; ultrasonic uses heat
• D. Radiographic uses dye penetrant; ultrasonic uses radiography

Answer: (A)

The test compares how each method uses different signals to inspect inside a part. Radiographic testing relies on penetrating radiation—X-rays or gamma rays—to pass through the material and create an image of internal features based on how the radiation is absorbed. This makes hidden flaws or thickness variations appear on film or a detector, like a shadow image of the interior. Ultrasonic testing uses high-frequency sound waves; a transducer sends pulses into the material, and echoes from flaws or boundaries return to the probe, with the timing and strength of those echoes revealing flaw locations and allowing thickness measurements when the material’s acoustic velocity is known. That’s why the statement describing radiographic testing as using X-ray/gamma to view internal features and ultrasonic testing as using sound waves to detect flaws and measure thickness is correct. The other descriptions mix up the signal types or refer to tools like magnetic fields, heat, or dye penetrants, which don’t apply to these two methods.

The test compares how each method uses different signals to inspect inside a part. Radiographic testing relies on penetrating radiation—X-rays or gamma rays—to pass through the material and create an image of internal features based on how the radiation is absorbed. This makes hidden flaws or thickness variations appear on film or a detector, like a shadow image of the interior. Ultrasonic testing uses high-frequency sound waves; a transducer sends pulses into the material, and echoes from flaws or boundaries return to the probe, with the timing and strength of those echoes revealing flaw locations and allowing thickness measurements when the material’s acoustic velocity is known. That’s why the statement describing radiographic testing as using X-ray/gamma to view internal features and ultrasonic testing as using sound waves to detect flaws and measure thickness is correct. The other descriptions mix up the signal types or refer to tools like magnetic fields, heat, or dye penetrants, which don’t apply to these two methods.