Piston engine · Question 4 of 12
An aeroplane is standing on the ground with the master switch off. How do you treat the propeller?
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Answer
- C Always as if the engine could start at any moment
Explanation
The magnetos are independent of the master switch. If a ground lead is broken, a magneto can produce sparks even with the ignition off when the propeller is moved. That is why you keep clear of the propeller arc and treat every propeller as "live".