AMP - Aviation Maintenance Technician Powerplant Practice Exam

What is a common method used to measure component clearances in engines?

1. Visual inspection with a flashlight

2. Using calipers and gauges

3. Relying on the manufacturer’s specifications

4. Listening for sounds during operation

The correct answer is: Using calipers and gauges

Using calipers and gauges is a standard method for measuring component clearances in engines because these tools provide precise measurements that are critical in ensuring that engine components fit together properly and function effectively. Calipers can measure various dimensions, such as outer diameter, inner diameter, and depth, while gauges are particularly useful for checking specific clearances, such as those between moving parts. This accuracy is essential in aviation maintenance since even minor deviations in clearance can lead to performance issues, increased wear, or even engine failure. While visual inspection can help identify obvious wear or damage, it cannot provide the detailed measurements needed to assess clearances accurately. Relying solely on manufacturer specifications is important for context but does not replace the actual measurement of clearances that tools like calipers and gauges provide. Similarly, listening for sounds during operation may give some indications of issues, but it is not a reliable method for determining precise clearances.