AMP - Aviation Maintenance Technician Powerplant Practice Exam

How can a mechanic verify if an engine component is within acceptable tolerances?

1. By conducting an engine run-up

2. By using tools like calipers, micrometers, and gauges

3. Through a visual inspection only

4. By performing a magnetic particle inspection

The correct answer is: By using tools like calipers, micrometers, and gauges

Using tools like calipers, micrometers, and gauges is the most reliable method for a mechanic to verify if an engine component is within acceptable tolerances. These precision measuring tools allow the mechanic to take accurate measurements of specific dimensions and ensure they fall within prescribed specifications outlined in the manufacturer’s documentation or maintenance manuals. This helps in assessing the wear and tear of engine components and whether they are still serviceable. Other methods, although useful in certain contexts, do not provide the same level of exactitude. For example, an engine run-up primarily tests the engine's operational characteristics rather than measuring physical dimensions. A visual inspection can identify obvious issues like cracks or wear but would not yield precise dimensional data needed for tolerance verification. Similarly, a magnetic particle inspection is excellent for detecting surface and near-surface flaws in ferromagnetic materials but does not assess dimensional tolerances directly. Therefore, using precision measurement tools is essential for ensuring that components meet the necessary specifications for safe operation.