A Non Destructive Test (NDT) is a type of testing that is used to evaluate the properties of a material, component or system without causing any damage. This type of testing is often used in the manufacturing, construction and engineering industries to ensure the safety and reliability of products and components. NDT is a cost-effective way to identify potential problems before they become costly failures. It can also be used to assess the integrity of structures, such as bridges and buildings, and to detect corrosion or other signs of wear and tear. NDT can be used to inspect a wide range of materials, including metals, plastics, composites, and ceramics. It is also used to inspect welds, detect cracks and other defects, and to measure the thickness of materials. NDT is a vital tool for ensuring the safety and reliability of products and components, and it is an essential part of any quality assurance program.