Your examiner asks: "Beyond the cylinders themselves, what other components of a fixed CO2 flooding system require periodic testing, and roughly how often?"

A. Beyond cylinder weighing, the fixed CO2 system's CONTROL VALVES and distribution manifold should be checked/tested regularly (commonly at least annually) to confirm correct operation and position, with the overall system (including checking for leakage at joints and connections) inspected on a routine basis such as monthly. The FLEXIBLE HOSES connecting cylinders to the manifold have their own, longer-interval replacement/testing regime — flexible hoses degrade over time even without visible damage, so they are typically required to be replaced at intervals set by the manufacturer or a defined maximum (commonly cited as not exceeding around 10 years), rather than being expected to last indefinitely. Piping integrity is also subject to periodic pressure testing as part of the overall system maintenance regime.

B. Only the cylinders require any periodic testing; control valves, manifold piping, and flexible hoses have no separate testing or replacement requirement once the system is first installed.

C. Flexible hoses in a CO2 system are designed to last the entire lifetime of the vessel with no periodic replacement requirement, regardless of manufacturer guidance.

D. Control valves need only be checked once, at the time of initial commissioning, with no subsequent periodic testing throughout the vessel's service life.

A. Nothing — a test lift can proceed immediately after repairs

B. Testing should wait until cargo operations begin

C. The area within the grab's swing radius should be cleared of personnel before the lift

D. Only the crane operator needs to be aware the lift is happening

A. Who must remain clear of the exclusion zone while the lift takes place

B. The lunch schedule for the deck team

C. Only the weather forecast for the next watch

D. The cargo manifest for the next port