Using the manual start for an engine, how many igniters will activate?

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Multiple Choice

Using the manual start for an engine, how many igniters will activate?

Explanation:
Two igniters are activated. The A320 engine ignition system uses a pair of igniters, and when you select manual start, both ignition circuits are energized to provide a reliable light-off. This redundancy helps ensure the engine lights reliably under varying conditions. There aren’t more than two igniters, and operating with just one would reduce reliability, which is why the manual start energizes both.

Two igniters are activated. The A320 engine ignition system uses a pair of igniters, and when you select manual start, both ignition circuits are energized to provide a reliable light-off. This redundancy helps ensure the engine lights reliably under varying conditions. There aren’t more than two igniters, and operating with just one would reduce reliability, which is why the manual start energizes both.

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