Question

When performing liquid penetrant examination, excess penetrant removal comes after which one of the following penetrant steps:

a) Application of developer.
b) Application of penetrant.
c) Penetrant dwell time.
d) Final surface cleaning.
e) Drying of the material under test.

Answer 1

Excess penetrant removal in liquid penetrant examination is done after the penetrant dwell time and before applying developer.

Step-by-step explanation:

In the process of a liquid penetrant examination, excess penetrant removal is performed after penetrant dwell time and before the application of developer. The main steps in a liquid penetrant inspection are as follows: initially, the surface is cleaned, after which the penetrant is applied. After the penetrant dwell time, during which the penetrant has time to seep into any flaws such as cracks, the excess penetrant is carefully removed from the surface. This is followed by the application of developer, which helps to draw the penetrant out of the flaws so that they can be more easily seen. Lastly, the final inspection is performed, and the surface may be subjected to final cleaning.