Which of the following is not a type of non-destructive examination?

Study for the Massachusetts 3rd Class Engineer Exam. Access flashcards and multiple choice questions with hints and explanations. Prepare for success on your exam!

The classification of testing methods as either non-destructive or destructive is crucial in engineering and material inspection processes. Non-destructive examination (NDE) techniques, such as radiographic testing, ultrasonic testing, and visual inspection, are designed to evaluate the properties and integrity of materials without causing any damage to them.

Radiographic testing involves using X-rays or gamma rays to reveal internal flaws in materials; it does not alter the material's condition. Similarly, ultrasonic testing uses high-frequency sound waves to detect flaws or measure thickness, providing valuable data while maintaining the integrity of the material. Visual inspection, the simplest form of non-destructive testing, allows for the identification of surface defects without any interference with the object in question.

In contrast, destructive testing involves methods that permanently damage or alter the material being tested. This could include tensile testing, where the material is stretched to its breaking point, providing important data on strength but rendering the material unusable afterward. Thus, among the options provided, destructive testing is the method that does not align with the principles of non-destructive examination, making it the correct choice as it involves the destruction of the material to gain insights.

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