The relief valve for a fire pump should be...

Question 1 of 270705eccef9ebacbc34ba4d463e1

The relief valve for a fire pump should be set at 25 psi above the pressure necessary to maintain the required fire hose streams, or at a minimum pressure of ______, whichever is greater.

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Question 1 of 27070

The relief valve for a fire pump should be set at 25 psi above the pressure necessary to maintain the required fire hose streams, or at a minimum pressure of ______, whichever is greater.

🔍 Key Concepts

• Relief valves are safety devices that protect piping from excessive pressure • Fire pumps must maintain required hose streams but also avoid over-pressurizing hoses and fittings • The regulation sets a margin above required pressure AND a fixed minimum setting; you choose the higher value

💭 Think About

• First, imagine you know the pressure needed to supply the required fire hose streams. If you add 25 psi to that, what kind of number would you typically get on a shipboard fire main? • Think about what pressure level would be high enough to be a meaningful safety limit, but not so low that it is triggered during normal firefighting operations. • Compare each choice to a realistic fire main working pressure on board (often around 100 psi at hydrants). Which minimum would still protect the system without constantly dumping water through the relief valve?

✅ Before You Answer

• Verify that the relief valve setting must be either 25 psi above needed pressure OR a specific minimum psi value, whichever is greater. • Check which option would make sense as a minimum on many vessels whose fire main operates near or above 100 psi. • Eliminate any pressures that are clearly too low to serve as a safe upper limit above typical operating fire main pressures.