Liquid Penetrant Testing Level 3 (PT-3) Practice Exam

Question: 1 / 400

Why must the liquid penetrant be compatible with the developer?

To enhance the color of the indications

To ensure it will not negatively react, affecting visibility

The compatibility of the liquid penetrant with the developer is crucial because any negative reaction between the two can lead to poor visibility of the indications. When the penetrant and developer are not compatible, there might be chemical interactions that could alter the properties of either substance, potentially causing cloudiness, discoloration, or even the complete disappearance of indications. This would make it difficult to accurately assess the surface for defects, undermining the effectiveness of the liquid penetrant testing process.

For successful results, it is essential that both the penetrant and developer work together as intended, allowing the penetrant to be drawn out of any surface defects and the developer to create a contrasting background against which these defects can be highlighted clearly. Thus, ensuring compatibility maintains the integrity of the test and enhances the reliability of the results.

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To improve the penetrant's viscosity

To increase the detection range

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