Non- Destructive TestingCritical thinking essay as being professional engineer answer2. Rank all kinds of NDT from the most expensive to the cheapest.3. What is the most used NDT process in the industry?Check the guide below IntroductionNon-destructive testing (NDT) is a mechanism used by engineers to detect defects in materialsand structures, either during manufacturing or while in service. Typically, the methods used areultrasonics, radiography, magnetic particle, eddy current, dye penetrant and visual methods.This important and growing industry is involved in applying these proven techniques andprocedures to the full range of engineering structures.When NDT is deployed to best effect as part of the complete engineering design process, itensures the safe, reliable and long-lasting integrity of structures, such as power stations, aircraft,oil & gas installations and other safety-critical plant. Every day, more than 25,000 inspectionsare carried out in factories and on-site in the UK to detect defects and damage in a huge rangeof products, plant and structures; it is estimated that there are more than 120,000 inspectorsoperating worldwide Kinds of Non-Destructive TestingVisual and Optical TestingVisual testing is the most widely used method of non-destructive testing (NDT). Eventhe more sophisticated methods require a visual test to be performed. In other methods,such as magnetic particle testing, after a component has been magnetised, the operatorperforms a visual inspection to look for indications. Large sections of industry tend totake visual testing for granted and pay little attention to training.Ultrasonic TestingUltrasonic testing is a versatile non-destructive testing (NDT) method. Many techniqueshave been developed to allow full volumetric inspection of a large range of componentsmade from a wide variety of materials. It is probably the most important method used inindustry, certainly in the UK.Radiographic TestingRadiography was one of the earliest NDT methods but, due in some way to health andsafety implications, alternative methods are replacing it, for some applications, inindustry. However, radiography remains one of the two main volumetric NDT methods.Eddy Current TestingEddy current testing is a sophisticated method of non-destructive testing (NDT) in whichshallow swirling electric eddy currents are introduced into a component, allowing thedetection of surface and slightly sub-surface discontinuities.Magnetic Particle TestingMagnetic particle testing is a relatively simple non-destructive testing (NDT) techniquethat can be used in the detection of surface and slight sub-surface discontinuities inmagnetic materials.Penetrant TestingPenetrant testing is a simple non-destructive testing (NDT) method used to locatesurface-breaking discontinuities in metals and many non-metals using a penetratingliquid.Thermal and Infrared TestingThermal and infrared testing is a relative newcomer to the world of non-destructivetesting (NDT). It involves monitoring the temperature variations of objects in the infraredportion of the electromagnetic spectrum.

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Based on the cost the types of NDT can be ranked from expensive to cheap as,
1. Radiographic testing…