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

Question 1 / 2707066636ef128f7522a1c5219ed

Question 1 of 2707066636ef128f7522a1c5219ed

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

Back

Question 1 of 27070

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

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

🔍 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?

Question 1 of 27070

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

Loading interactive features...

Question 1 / 2707066636ef128f7522a1c5219ed

Question 1 of 2707066636ef128f7522a1c5219ed

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

Back

Question 1 of 27070

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

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