Question 6 TK01 - Tank Vessel Assistant - Dangerous Liquids

The Correct Answer is D **Explanation for Option D (Correct Answer):** U.S. regulations governing the transfer of oil (specifically found in Title 33 of the Code of Federal Regulations (CFR), particularly Part 155 and Part 156, which deal with oil transfers and operations) mandate specific checks before the transfer begins. One of the fundamental requirements for ensuring safety, preventing spillage, and starting the transfer process is verifying that the entire transfer system is ready and correctly aligned. Regulation 33 CFR § 156.120(h) requires that the person in charge ensure, among other things, that "all parts of the transfer system are properly lined up to the receiving tank." This alignment ensures the oil flows correctly into the intended receiving vessel or facility and not overboard or into an incorrectly closed line, making this condition an absolute prerequisite for starting the transfer. **Why the Other Options Are Incorrect:** * **A) a representative sample has been taken from the oil being received:** While sampling is a common operational procedure for quality control, regulatory requirements for oil transfers focus primarily on spill prevention and safety before the transfer *starts*. Sampling may occur during or after the transfer but is not the required regulatory condition that must be met *before* initiating the flow. * **B) oil residue has been drained from all hoses:** This action (draining residue) typically occurs *after* the transfer is complete, as part of the disconnection and cleanup procedure, not as a precondition for starting the transfer operation. The hoses must be properly connected and checked before starting, but draining them is the final step. * **C) an oil containment boom is available for immediate use:** Having spill containment equipment, including booms, readily available is a mandatory requirement for the vessel and facility *during* the transfer operation (33 CFR § 155.750). However, the specific regulatory language states the condition for *starting* the transfer usually revolves around the system integrity and communications being established (such as checking alignment, warning signs, and confirming readiness), making alignment (D) a more direct regulatory precondition for the act of transferring. The availability of equipment is an ongoing requirement, but the alignment check is a pre-transfer verification prerequisite.