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------------------------------------------------ What is required when operating two aircraft AC generators in parallel?

A) Different frequencies for each generator
B) Synchronization of frequencies, voltages, and phase angles
C) Random connection of generator outputs
D) Operation with one generator at a time

To operate two AC generators in parallel, synchronization of frequencies, voltages, and phase angles is necessary to prevent power issues and ensure smooth operation.

Explanation:

When operating two AC generators in parallel, it is required that there is synchronization of frequencies, voltages, and phase angles. This is essential to ensure that the generators work effectively together without causing power surges or damaging the electrical system. Proper synchronization means that both generators must produce the same frequency, the voltage must be aligned, and the phase angles must match to allow for smooth, uninterrupted power. Options such as running AC generators at different frequencies, random connection of outputs, or operating only one generator at a time are not viable for parallel operation.