Final answer:
To troubleshoot fuel quantity coaxial cables, the appropriate tool is a Time-domain reflectometer (TDR), which measures reflections in the cable to detect faults.
Step-by-step explanation:
To troubleshoot fuel quantity coaxial cables, the most appropriate instrument to use is a Time-domain reflectometer (TDR). This device sends a signal down the cable and measures the reflection to detect faults such as shorts, opens, and impedance mismatches. When choosing measurement tools for different tasks, the context and nature of what is being measured inform the most suitable selection. For example:
- To measure the volume of a water balloon, one might use a graduated cylinder.
- The length of a basketball court could be measured using a measuring tape.
- An ammeter would be inappropriate as it measures electrical current, not faults in coaxial cables.
- A phase-angle voltmeter, while useful for measuring the phase difference between two signals, does not help in identifying specific issues within coaxial cables as a TDR would.
It's imperative to choose an instrument that is designed for the specific type of measurement needed for accuracy and efficiency in troubleshooting.