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52 - ATPL Question Bank in English - For a conventional chromel/alumel thermocouple connected directly to a moving-coil temperature indicator, without electronic amplification or a digital display, what external electrical supply is required?

Question 52 - Aircraft General Knowledge - Instrumentation - ATPL - Airline Transport Pilot Licence

3 phase AC for sensor plus 28V DC for gauging
No external supply for the temperature-measuring circuit; a separate supply may be required for gauge lighting
28V DC for sensor plus power for gauge lighting
3 phase AC for sensor plus 26V AC for gauge lighting

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