Exam Question
(a) What is non-destructive testing? What are non-destructive methods used in practice? (6)
(b) What are the advantages of non-destructive testing? (6)
(c) What are limitations of non-destructive testing (4)
Class 4 (4th Engineer)
MEP
📅 Sep 2023
Reference Answer
### (a) Non-Destructive Testing (NDT) and Common Methods
**Definition:**
Non-Destructive Testing (NDT), also known as Non-Destructive Examination (NDE), comprises a wide group of analysis techniques used in science and industry to evaluate the properties of a material, component, or system without causing damage. The primary objective of NDT is to detect, locate, and size surface and subsurface discontinuities (flaws) such as cracks, voids, porosity, and inclusions. As stated in the provided context, these tests "neither break nor alter the structure or appearance of the welded component," making them invaluable for quality control during fabrication and for in-service inspections of critical machinery and hull structures onboard a vessel.
**Common NDT Methods Used in Marine Practice:**
**Definition:**
Non-Destructive Testing (NDT), also known as Non-Destructive Examination (NDE), comprises a wide group of analysis techniques used in science and industry to evaluate the properties of a material, component, or system without causing damage. The primary objective of NDT is to detect, locate, and size surface and subsurface discontinuities (flaws) such as cracks, voids, porosity, and inclusions. As stated in the provided context, these tests "neither break nor alter the structure or appearance of the welded component," making them invaluable for quality control during fabrication and for in-service inspections of critical machinery and hull structures onboard a vessel.
**Common NDT Methods Used in Marine Practice:**
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