Question

þ) List six most common type of non-destructive test and describe two of them (e.g. principle and application)

Answer 1

Common Type of Non-destrutive Test - 1) Visual Inspection 9) Dye Penetrant Teeting. 3) Magnetic Particle Testing 4) Ultrasonic Testing 5) Eddy current Testing 6) Magnetic flux leakage 2) Dye Penetsant ſesting: - This includes following steps - ij Surfare cleaning Make sure surface should be cleaned to remove dust, grease oil ete i Application of penetrant -; Now cleemed part je covered with penetrant bey brushing or spraling. ii) Removal of penetrant -; After sufficient penetrant applied on surface it is to be tewted extra penetrant wiped off ivy Developing - The developer helps in drawing out the penedromt so, that it becomes virible on surface. W inepeltion : Dep Developed Surface is viewed pot detection of defects, Removal of excess pened rant Application of penchant

2. Magnetic particle Testing : - It is a type of NOT thout utilise a magnetic field and ultrafine magnetic preticles to find the defects in metals. These particles basically are iron Shaving that is use to find email crack's that are not easily visible by naked eye. The presence of a surface or crack's or Dls continuity' in Metal allows the magnette Huse to leaks for this Defective part is wet suspended in ferros particle.