Liquid Penetrant Testing Level 1 (PT-1) Practice Exam

Which penetrant method does not typically require a source of electricity to conduct the test?

1. Fluorescent penetrant method

2. Visible dye penetrant method

3. Automated penetrant method

4. Ultrasonic penetrant method

The correct answer is: Visible dye penetrant method

The visible dye penetrant method does not typically require a source of electricity for conducting the test. This method relies on the use of color contrast between the penetrant and the surface being inspected. After applying the penetrant, it seeps into surface defects. The excess penetrant is then removed, and a developer is applied that draws out the penetrant from the defects, which can be viewed under visible light. In contrast, methods such as the fluorescent penetrant method, which utilizes ultraviolet light for inspection, inherently require electricity to power the UV light source. The automated penetrant method, which often uses machinery for application and examination, also requires electrical power to operate. The ultrasonic penetrant method does not exist as a standard penetrant technique; ultrasonic testing does involve electrical equipment but is not related to penetrant testing. Therefore, the key characteristic of the visible dye penetrant method is its ability to successfully detect flaws without the need for any electrical devices, distinguishing it clearly within the methods laid out in the question.