| While on watch at sea with only one ship's service turbo- generator on line, the entire plant suddenly blacks out without warning. After restoring power, which of the following faults would most likely have attributed to this casualty? |
| A) The turbo-generator throttle valve position "micro switch" vibrated open, allowing the main breaker to trip open according to its protection circuitry. |
| B) Someone pushed the trip button to the 'shore power' breaker. |
| C) The main air compressor suddenly stopped. |
| D) The standby generator started automatically and became motorized. |
