Engine: Electricity

1. A Since it is normally closed, it is the means by which the emergency generator control circuit senses the voltage at the main bus.
2. B Since it is normally closed, it is the means by which the emergency generator control circuit senses the voltage at the emergency bus.
3. C It allows the emergency generator to feed the main bus during dead ship start up, otherwise it is generally open and not used.
4. D It allows the emergency generator to be paralleled with the ship's service generators when additional power is needed.

Tip: press A-D to answer