The fluorescent dyes used in the liquid penetrant testing process are most active when energised with black light of what wavelengths? (Å stands for angstrom units)

Related MCQs

• For adequate test results, the black light used in fluorescent penetrant examination should provide what minimum black light intensity at the test surface?
• Most fluorescent dyes used for magnetic particle testing fluoresce what colour?
• While performing a fluorescent water washable penetrant test, which of the following steps should be performed under black light?
• When performing a fluorescent penetrant examination, excess penetrant is normally removed:
• The advantages of using a visible solvent removable penetrant versus a post emulsified fluorescent penetrant is:
• Fluorescent penetrant indications are more visible than colour contrast penetrant indications because:
• When using a post emulsifiable penetrant process, it is important to drain as much excess penetrant as possible from the surface of a test piece which has been immersed in the penetrant because:
• Dyes which receive light at one wavelength and re-emit light of another wavelength are called:
• The colour of fluorescent penetrant under the presence of a UV light is:
• Over washing during excess penetrant removal is less likely with which penetrant testing process?