Linux Professional Institute Certification Level 1 (LPIC-1) Practice Test

Power wire brushing is not commonly used to clean parts prior to penetrant testing because it can introduce problems that affect the accuracy of the testing process. While it may remove surface contaminants, wire brushing can also create scratches or grooves in the material surface, thereby leaving potential defects hidden beneath these markings. This can lead to false indications in the penetrant testing process, making it less effective.

On the other hand, alcohol rinsing, steam cleaning, and ultrasonic cleaning are preferred methods for cleaning parts before penetrant testing. Alcohol rinsing effectively removes oils and greases without leaving residues that could interfere with the penetrant process. Steam cleaning is effective for removing contaminants using heat and pressure, and ultrasonic cleaning provides thorough cleaning by utilizing high-frequency sound waves to eliminate dirt and debris from hard-to-reach areas without damaging the part being tested. These methods ensure that the surfaces are adequately cleaned, allowing for accurate evaluation during the penetrant test.

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