What power arrangement do the generators provide?

• A. Each provides a primary AC source and three isolated DC sources from a permanent magnet generator (PMG)
• B. The generators supply a single AC source with multiple DC outputs from a turbine generator
• C. The generators provide only DC power with no AC outputs
• D. The generators supply two AC sources and two DC sources from a PMG

Answer: (D)

Two engine-driven generators provide the main AC power, giving two separate AC sources for redundancy and stable distribution, while a permanent-magnet generator supplies two isolated direct-current outputs to essential DC buses. This setup keeps critical loads powered even if one AC source drops out, since the DC power from the PMG remains available independently of the AC generators. The other descriptions either imply the DC outputs come from the turbine generator, or claim only DC power or a single AC source, which doesn’t match how the Growler’s electrical system is arranged.