SACAA AME Electrical & Radio Practice Questions - SACAA Aircraft Maintenance Engineer Electrical Equipment (CAT X & W) Theoretical Knowledge Examination Exam

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How does a Constant Speed Drive (CSD) maintain a constant alternator output frequency despite varying jet engine speeds?

By varying the electrical frequency output electronically using a static inverter By using a hydro-mechanical variable-displacement hydraulic pump and fixed motor differential gear system By slipping an electromagnetic clutch between the engine accessory gearbox and alternator shaft By altering the field pole excitation strength in proportion to rotor RPM changes

Correct Answer:

By using a hydro-mechanical variable-displacement hydraulic pump and fixed motor differential gear system

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