Exam Question
Describe following non-destructive test methods:
(a) Dye penetration test - principal and method in detail (8)
(b) Magnetic particle testing - principal and method in detail (8)
Class 4 (4th Engineer)
MEP
📅 Feb 2023
Reference Answer
### (a) Dye Penetration Test (DPT)
This method is also known as Liquid Penetrant Inspection (LPI). It is a widely used and low-cost non-destructive testing (NDT) method to locate surface-breaking defects in non-porous materials.
#### 1. Principle
The fundamental principle of DPT is based on **Capillary Action** and **Reverse Capillary Action (Blotting)**.
This method is also known as Liquid Penetrant Inspection (LPI). It is a widely used and low-cost non-destructive testing (NDT) method to locate surface-breaking defects in non-porous materials.
#### 1. Principle
The fundamental principle of DPT is based on **Capillary Action** and **Reverse Capillary Action (Blotting)**.
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