🔍 Key Concepts

• 46 CFR requirements for boiler safety valves (look in Subchapter F – Marine Engineering, especially parts dealing with power boilers) • Purpose of a safety valve and why it must be set and verified under actual operating (steam) conditions • Differences between piping restrictions on drains/leak‑offs and requirements about safety valve gagging/clamping

💭 Think About

• Ask yourself: Which option directly relates to making sure the safety valve will actually open at the correct pressure in real service? • Consider whether regulations would ever allow anything that could unintentionally restrict, block, or delay the opening of a safety valve or the relieving of pressure. • Think about whether Coast Guard rules typically require you to carry gags/clamps at all times, or instead tightly control when and how they are used (e.g., during testing or maintenance only).

✅ Before You Answer

• Verify in 46 CFR whether settings of safety valves are required to be checked/adjusted specifically under steam pressure or if cold settings are acceptable. • Check whether 46 CFR forbids valves in leak‑off/drain lines connected to safety valves or headers, and under what conditions. • Confirm whether 46 CFR requires safety valve gags/clamps to be carried at all times, or merely controls their use when present.