Engine : Electricity - 1227/1386
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| How is the direction of propeller shaft rotation changed when directly coupled to an AC synchronous motor when driven by a variable frequency alternator in an AC turbo-electric drive system? |
| A) Reversing the polarity of the propulsion motor |
| B) Reversing the phase sequence of power to the motor |
| C) Reversing the polarity of the propulsion generator |
| D) Reversing the rotation of the steam turbine |
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