Question 505Electricity & Electronics - Assistant Engineer

The correct answer is A. On a loss of normal ship's power, the temporary emergency loads power source is the battery (from AC/DC UPS "B"), whereas the final emergency loads power source is the emergency generator. This is in accordance with maritime regulations that require emergency power systems to have a temporary source (such as batteries) to immediately supply critical loads, followed by a final source (such as an emergency generator) to sustain power for a longer duration. The other options are incorrect because they do not accurately describe the power flow and sources as depicted in the one-line diagram. For example, option B incorrectly states that the final emergency loads power source is the battery, when it should be the emergency generator.