Eddy Current Test	Penetrant Test	Magnetic Particle Test	Visual Test
Radiographic Test	Ultrasonic Test	Magnetic Flux Leakage Test	Visual Test Using Fibrescope

Penetrant Test	Principle Application Advantage Limitation
Principle	Back
Liquid penetrant test locates and determines the severity of surface discontinuities in variety of both metallic and non-metallic and non-metallic based on capabillary action

Application	-	Weld discontinuites open to surface, i.e. cracks, porosity, seams.	Back
Advantage	-	May be used on all nonporous materials.	Back
	-	Portable, relatively inexpensive equipment.
	-	Expedient inspection results.
	-	Results are easily interpreted.
	-	Requires no electrical energy except for light source.
	-	Indications may be further examined visually.
Limitations	-	Surface films such as coatings, scale, smeared metal mask or hide rejectable defects.	Back
	-	Bleed out from porous surfaces can also mask indications.
	-	Parts should be cleaned before and after inspection.