According to Pollution Prevention...

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Question 1 of 205eccef9dbacbc34ba4d45ce9

According to Pollution Prevention Regulations (33 CFR), the pump being used for cargo transfer has a relief valve setting of 65 psi and a static head of 10 feet. The vessel's cargo hose used for the transfer must have a maximum allowable working pressure of at least __________.

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🔍 Key Concepts

• 33 CFR pollution prevention regulations for cargo hose pressure ratings during transfer operations • Relationship between relief valve setting, static head, and required maximum allowable working pressure (MAWP) • Understanding how to convert feet of head into psi and how that affects hose requirements

💭 Think About

• First, combine the relief valve setting and the static head pressure into a single pressure value. What physical situation does that total represent? • Think about why regulations would require the hose working pressure to be related to that total system pressure. Should it be lower than, equal to, or higher than that combined pressure for safety? • Compare each answer choice to the idea of a reasonable safety margin above the maximum expected system pressure. Which options seem too low or unnecessarily high?

✅ Before You Answer

• Confirm how many psi per foot of head to use when converting 10 feet of head to pressure in psi. • Verify in 33 CFR that the hose MAWP must be at least related to the sum of relief valve pressure and static head, not just one or the other. • Check which choices talk about a simple minimum greater than the sum versus a multiple of the sum, and decide which better matches typical hose rating rules.

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