Which of the following statements is correct...

🔍 Key Concepts

• Centrifugal feed pump start-up sequence and why you need liquid at the eye of the impeller before starting • Safe practices for venting and draining steam lines to a turbine before opening up to full pressure • What happens if a turbine or pump is started with no suction, air-bound casing, or water-hammer risk

💭 Think About

• Think through what a feed pump actually needs in place (on the water side) before you ever spin it with the turbine—what must be open or filled? • Consider which valves (vents, drains, exhaust) are typically opened during warm-up and why suddenly trapping steam or condensate can be dangerous. • Ask yourself: in normal shipboard procedures, which item in the choices would almost always be explicitly stated in the checklist as a first step on the pump side?

✅ Before You Answer

• Verify which side of the system each choice is dealing with: pump suction, pump casing vent, steam drains, or steam exhaust. • Check which actions would risk air-binding the pump, water hammer, or over-pressurizing part of the steam system. • Confirm which step is a standard, must-do action for almost any centrifugal pump prior to starting its driver.

Which of the following statements is correct regarding the start-up operation of a non-condensing turbine-driven feed pump?

Keep the pump casing vent valve closed until flow is established through the pump.

Secure all drains prior to admitting any steam to avoid damage to traps.

Keep the steam exhaust valve closed until steam is applied to ensure that the auxiliary exhaust line pressure does not drop.

Open the pump suction valve prior to admitting steam to the turbine.

🔍 Key Concepts

💭 Think About

✅ Before You Answer