In order to test the lifting pressure of the...

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Question 1 of 205eccefa0bacbc34ba4d46ff8

In order to test the lifting pressure of the deaerating feed heater relief valve, you would __________. place a gag on the relief valve increase the set point of the reduced steam pressure to the auxiliary steam system

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🔍 Key Concepts

• Purpose and operation of a deaerating feed heater relief valve • Difference between mechanically preventing a valve from lifting (gagging) vs. changing upstream steam pressure • Safe and accepted methods for testing safety/relief valve set pressure on marine boilers and auxiliaries

💭 Think About

• Think about what the purpose of a relief valve is and what you are actually trying to verify when you test its lifting pressure. • Ask yourself: if you physically prevent a relief valve from opening, can you still determine at what pressure it would have lifted? • Consider what happens to the feed heater and the relief valve if you gradually change the steam pressure supplied to it under controlled conditions.

✅ Before You Answer

• Verify whether a gag is used during a lifting-pressure test or during other maintenance/overhaul procedures. • Confirm how increasing auxiliary steam system pressure would affect the pressure at the deaerating feed heater relief valve inlet. • Make sure any chosen method is safe, controlled, and consistent with typical marine safety/relief valve testing practices.

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