To stop the rotor of a main turbine while...

Question 1 / 2066636ef128f7522a1c5219ed

Question 1 of 2066636ef128f7522a1c5219ed

To stop the rotor of a main turbine while underway at sea you should __________.

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Question 1 of 20

66636ef128f7522a1c5219ed

To stop the rotor of a main turbine while underway at sea you should __________.

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🔍 Key Concepts

• How a steam turbine rotor behaves when steam is secured while the ship is still moving through the water • The effect of astern steam on turbine and shaft rotation when the vessel has headway • Why a Prony brake and stern tube packing are not normal in‑service methods for stopping a main turbine rotor at sea

💭 Think About

• If the ship is still moving ahead through the water, what tends to happen to the turbine rotor and shaft when you simply secure all steam? • What condition inside the turbine does admitting astern steam create, and how does that influence the direction and speed of rotor rotation? • Which of the options is actually a performance/measurement or sealing adjustment, rather than an operational maneuver to control rotor speed underway?

✅ Before You Answer

• Identify which choice is a normal operating procedure used by engineering watchstanders at sea, not in a test stand or in port • Eliminate any option that would mainly affect shaft sealing or bearing load, rather than directly and safely control rotor rotation • Consider turbine manufacturer and engineering practice: which method prevents the rotor from windmilling when the ship still has headway?

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Question 1 of 20

To stop the rotor of a main turbine while underway at sea you should __________.

apply the Prony brake

admit astern steam to the turbine after securing the ahead steam

tighten the stern tube packing gland

secure all steam to the turbine

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Question 1 / 2066636ef128f7522a1c5219ed

Question 1 of 2066636ef128f7522a1c5219ed

To stop the rotor of a main turbine while underway at sea you should __________.

Back

Question 1 of 20

66636ef128f7522a1c5219ed

To stop the rotor of a main turbine while underway at sea you should __________.

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