If you are underway at full speed on a...

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Question 1 of 205eccefa1bacbc34ba4d47339

If you are underway at full speed on a vessel fitted with a main propulsion turbine pressure lubrication system, which of the following actions will be necessary upon complete loss of lube oil pressure?

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🔍 Key Concepts

• Main propulsion steam turbines and why they need continuous lube oil pressure • Consequences of a complete loss of lube oil pressure on turbine and reduction gear bearings • Normal versus emergency securing procedures for a turbine plant (steam, jacking gear, condenser vacuum)

💭 Think About

• Ask yourself: With no lube oil pressure at full speed, how long can you safely keep the turbine and gears turning before serious damage occurs? • Which action(s) directly stop metal-to-metal contact in the main bearings the fastest, and which actions are secondary or optional? • Consider what jacking gear is used for and when it is normally engaged in relation to stopping the main turbine and losing lube oil.

✅ Before You Answer

• Verify which options immediately remove driving power/steam from the turbine so the shaft stops turning as fast as safely possible. • Check whether any option expects the turbine to keep running while lube oil pressure is lost — this would risk bearing wipe and severe damage. • Confirm in your steam plant knowledge whether jacking gear is only used when there is adequate lube oil pressure or if it is appropriate to engage it after total loss of lube oil.

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