FAA AMT Airframe Test 2025 – 400 Free Practice Questions to Pass the Exam

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A probe or a series of probes is used in which kind of fuel quantity indicating system?

Capacitor

A probe or a series of probes is used in a capacitor-based fuel quantity indicating system. This system works by measuring the difference in capacitance between two plates as the fuel level changes. This allows for a more accurate reading of the fuel level compared to systems that use resistors, inductors, or transformers. A resistor-based system would not be as precise since resistors have a fixed resistance and cannot accurately measure the changing fuel level. An inductor-based system would be less accurate because the inductor's magnetic field can be affected by external factors. Similarly, a transformer-based system would also be affected by external factors and may not provide an accurate reading of the fuel level. Therefore, a capacitor-based system is the most suitable for measuring fuel quantity.

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Resistor

Inductor

Transformer

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