Question 31

The Correct Answer is A **Explanation for A (plug the scuppers):** It is a mandatory and prudent safety measure to plug the scuppers (drains on deck) prior to the commencement of bunkering operations. This action prevents any potential oil spills (caused by overflow, leakage, or accidental release) from draining overboard and polluting the marine environment. By plugging the scuppers, any spilled oil is contained on deck, allowing it to be safely recovered using absorbents, thereby preventing a major environmental violation and potential hefty fines. **Why the other options are incorrect:** * **B) plug the sounding pipes:** Sounding pipes are essential for measuring the level of fuel in the tanks during the bunkering process. Plugging them would make it impossible to monitor the transfer, leading to a high risk of overfilling and spillage. Therefore, sounding pipes must remain open and accessible. * **C) close the lids on the vents:** Vents (or air pipes) are critical to allow displaced air to escape as fuel fills the tank. Closing the lids/openings on the vents during bunkering would prevent the air from escaping, creating dangerous backpressure, potentially rupturing the tank or causing a major oil spray from the overflow points. * **D) plug the vents:** This is incorrect for the same reason as C. Vents must remain open to prevent overpressure and allow air to escape, ensuring safe filling.