A triple element, main propulsion, boiler...

Question 1 / 2066636ef128f7522a1c521a62

Question 1 of 2066636ef128f7522a1c521a62

A triple element, main propulsion, boiler feedwater regulating system commonly used aboard ship utilizes __________.

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Question 1 of 20

66636ef128f7522a1c521a62

A triple element, main propulsion, boiler feedwater regulating system commonly used aboard ship utilizes __________.

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🔍 Key Concepts

• Triple-element (three-element) boiler feedwater control: what three variables are sensed and why this improves drum level control under changing load • Difference between proportional, reset (integral), and rate (derivative) actions in control systems • Why simple on/off (two-position) or single-mode control is usually not adequate for main propulsion boiler drum level on ships

💭 Think About

• Ask yourself: in a high‑pressure main propulsion boiler with rapidly changing steam demand, what kind of controller behavior is needed to prevent both slow drift and sudden level swings? • Think about what problems each control mode addresses: which one removes steady‑state error, which reacts to present error, and which anticipates rapid changes? • Which combination of modes would a designer choose for the most stable, precise control in a critical system like main propulsion feedwater, especially during rapid maneuvering or sea state changes?

✅ Before You Answer

• Identify what the three "elements" are in triple‑element control (hint: they are NOT the three control modes; they are three separate measurements). • Match each answer choice to the number of control modes it uses, and consider whether that matches the complexity implied by "triple element". • Eliminate any option that would allow large level overshoot or sluggish correction during rapid changes in steam flow, since that is unacceptable for main propulsion boilers.

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Question 1 of 20

A triple element, main propulsion, boiler feedwater regulating system commonly used aboard ship utilizes __________.

Proportional plus reset plus rate action

Proportional action

Two-position differential gap action

Proportional plus reset action

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Question 1 / 2066636ef128f7522a1c521a62

Question 1 of 2066636ef128f7522a1c521a62

A triple element, main propulsion, boiler feedwater regulating system commonly used aboard ship utilizes __________.

Back

Question 1 of 20

66636ef128f7522a1c521a62

A triple element, main propulsion, boiler feedwater regulating system commonly used aboard ship utilizes __________.

No comments yet

Be the first to share your thoughts!

If the question has a related picture, it will appear here.

🔍 Key Concepts

💭 Think About

✅ Before You Answer

👋 Hi! I'm Genie, your AI study assistant. How can I help you with this question?

Quick actions

— No credit card needed