Fuel Cell Anode Consumption — FRCA Primary MCQ
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Correct answer: E — The lead anode is consumed over time
The galvanic fuel cell generates its own EMF without external power. The lead anode is oxidised over time requiring cell replacement every 6-12 months. Its response time (~20-30 seconds) is too slow for breath-by-breath analysis. The Clark electrode is polarographic and requires an external voltage.
Reference: Al-Shaikh Stacey 2019 Essentials of Anaesthetic Equipment