If both generators are lost in flight, how long will the battery work for?

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Multiple Choice

If both generators are lost in flight, how long will the battery work for?

Explanation:
Two independent batteries supply emergency power, so when both generators are lost you have a total of 60 minutes of usable electrical time. Each battery provides 30 minutes, and you can run the system on the primary for 30 minutes and then switch to the auxiliary for another 30 minutes. That total of 60 minutes matches the scenario described. The other durations would require more power sources or longer battery capacity than what is available.

Two independent batteries supply emergency power, so when both generators are lost you have a total of 60 minutes of usable electrical time. Each battery provides 30 minutes, and you can run the system on the primary for 30 minutes and then switch to the auxiliary for another 30 minutes. That total of 60 minutes matches the scenario described. The other durations would require more power sources or longer battery capacity than what is available.

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