Which of the operating principles listed...

Question 1 / 270705eccefa0bacbc34ba4d46e49

Question 1 of 270705eccefa0bacbc34ba4d46e49

Which of the operating principles listed would apply to a single-element, thermo-hydraulic, feed water regulator?

Question 1 of 27070

Which of the operating principles listed would apply to a single-element, thermo-hydraulic, feed water regulator?

🔍 Key Concepts

• Single-element feed water regulator basic purpose and what it measures/controls • How a thermo-hydraulic (heat + fluid) closed system responds when temperature changes • Where the actuating force for the valve in this system actually comes from

💭 Think About

• Ask yourself: In a single-element system, is the regulator reacting mainly to water level, steam flow, or feed flow? How does that limit what it can keep constant? • Think about a sealed tube-and-bellows type device: when the fluid inside is heated, what expands or changes, and what part of the regulator would that motion act on? • Consider which option describes a built‑in fail-safe feature and whether that is a defining operating principle for this specific type of regulator, or just a possible design choice.

✅ Before You Answer

• Identify which choice describes the primary sensing/actuating action (how motion gets to the valve) rather than a secondary feature like cooling or safety. • Verify whether a single-element regulator can truly hold water level constant over the entire load range, or if its control is more limited than that. • Eliminate any option that describes something that is not typical of a closed thermo-hydraulic system (for example, ask if cooling fins are really needed to prevent steam formation in such a device).

Question 1 of 27070

Which of the operating principles listed would apply to a single-element, thermo-hydraulic, feed water regulator?

A failure of the regulator pressure actuating system closes the valve.

The regulator maintains a constant water level throughout the boiler load range.

The cooling fins on the generator prevent the formation of steam in the closed system.

The pressure in the inner tube acts upon the bellows of the regulator.

Question 1 / 270705eccefa0bacbc34ba4d46e49

Question 1 of 270705eccefa0bacbc34ba4d46e49

Which of the operating principles listed would apply to a single-element, thermo-hydraulic, feed water regulator?

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Question 1 of 27070

Which of the operating principles listed would apply to a single-element, thermo-hydraulic, feed water regulator?