Question 64 RVR03 - Mate of LT 500-1600 GRT

The Correct Answer is B **Explanation for B (Plug the scuppers):** Before commencing bunkering operations, a primary precaution is to prevent any potential oil spills (whether from overflow, leaks, or drips) from escaping the vessel and reaching the water. Scuppers are drain holes located on the deck that allow rainwater and deck washings to drain overboard. If oil accidentally spills onto the deck, unplugged scuppers provide a direct pathway for the oil to go into the sea, causing pollution. Therefore, plugging all deck scuppers is a standard, mandatory procedure to contain any spills on the deck for immediate cleanup, adhering to MARPOL regulations. **Explanation for A (Plug the vents):** Tank vents are essential for safety and operational efficiency during bunkering. As fuel enters the tank, air must be displaced, and the vents allow this air (and any associated vapors) to escape. Plugging the vents would lead to a buildup of pressure inside the tank, which could damage the tank structure or cause a catastrophic failure. **Explanation for C (Close the lids on the vents):** Similar to plugging the vents (Option A), closing the lids on the vents would trap air inside the tank as fuel is loaded. Vents must remain open to ensure safe displacement of air and prevent over-pressurization. **Explanation for D (Plug the sounding pipes):** Sounding pipes are crucial for monitoring the tank level during bunkering, allowing the crew to accurately measure how much fuel has been loaded and to prevent overflow. Plugging the sounding pipes would make it impossible to monitor the tank levels safely, significantly increasing the risk of an overflow.