Non-Destructive Testing (NDT) Practice Test

What level of penetrant sensitivity is required for engine rotating parts?

1. Level 1

2. Level 3

3. Level 4

4. Level 5

The correct answer is: Level 4

The sensitivity level required for penetrant testing of engine rotating parts must be high enough to detect very fine discontinuities that could lead to failure during operation, given the demanding and high-stress conditions these components face. Level 4 sensitivity is specified for such critical applications, enabling the detection of very small surface defects that could compromise the integrity and performance of the engine. In the context of non-destructive testing, penetrant levels are classified based on their ability to reveal the presence of defects, with a higher level indicating a greater capability to identify smaller or more subtle defects. Ensuring that Level 4 penetrant sensitivity is used for engine components aligns with industry standards and ensures safety and reliability in mechanical performance.