You are crude oil washing on a tanker with an inert gas system. What percentage of oxygen must the inert gas system produce and deliver to the tanks?
⢠Inert gas system requirements for tankers engaged in crude oil washing (COW) under SOLAS and IMO guidelines ⢠The maximum allowed oxygen content in the inert gas delivered to cargo tanks ⢠The difference between ideal (theoretical) 0% oxygen and the realistic regulatory limit used in practice
⢠Think about why total 0% oxygen is not a realistic requirement in shipboard systems and what a safe upper limit would be to prevent combustion in cargo tanks. ⢠Recall the SOLAS/IMO standard figure for the maximum oxygen content by volume in inert gas supplied to tanks during crude oil washing. ⢠Compare the answer choices and decide which one matches the widely accepted regulatory limit for inert gas oxygen content, rather than a perfect or approximate value.
⢠Verify the SOLAS / IMO crude oil washing and inert gas system oxygen limit (by volume) that must not be exceeded when delivered to the tanks. ⢠Confirm that the value in the rule is a maximum allowable percentage, not a target of 0%. ⢠Check that the option you choose matches the specific numerical limit used internationally for inert gas systems on tankers.
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