Which of the listed procedures should be...

Question 1 / 205eccefa1bacbc34ba4d472f6

Question 1 of 205eccefa1bacbc34ba4d472f6

Which of the listed procedures should be followed when raising vacuum on the main propulsion plant prior to getting underway?

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Question 1 of 20

5eccefa1bacbc34ba4d472f6

Which of the listed procedures should be followed when raising vacuum on the main propulsion plant prior to getting underway?

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🔍 Key Concepts

• Steam plant vacuum raising sequence – what has to be ready before you pull a vacuum on the condenser • Role of lube oil system and turning gear when getting a turbine ready to turn • Function and prerequisites of circulating/condensate pumps, air ejectors, and gland sealing system

💭 Think About

• In what condition must the main turbine and reduction gears be before you apply gland sealing steam and air ejectors? Cold and stopped, or already being lubricated and slowly rolled? • Do you want vacuum on the condenser before or after you have reliable lubrication and circulation of cooling water/condensate? Why? • Look for the choice that puts lubrication and safe slow turning of the turbine in place before building full vacuum and sealing steam around the shaft glands.

✅ Before You Answer

• Make sure lube oil system is started before anything that could allow the turbine to rotate or load the bearings • Verify that turning gear engagement happens only after lube oil pressure is established, not before • Check that air ejectors and gland sealing are not started until there is circulating and condensate flow so the condenser can actually pull and maintain vacuum safely

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Question 1 of 20

Which of the listed procedures should be followed when raising vacuum on the main propulsion plant prior to getting underway?

Start the condensate and circulating pumps, engage the turning gear, start the lube oil system, then start the first and second stage air ejectors and the gland sealing.

Start the lube oil system, engage the turning gear, start the condensate and circulating pumps, start the gland sealing system and second stage air ejector.

Start the lube oil system, start the second stage air ejector and the gland sealing system, start the condensate and circulating pumps, and start the turning gear.

Start the condensate and circulating pumps, start the lube oil system, start the air ejectors and the gland sealing system, and engage the turning gear.

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Question 1 / 205eccefa1bacbc34ba4d472f6

Question 1 of 205eccefa1bacbc34ba4d472f6

Which of the listed procedures should be followed when raising vacuum on the main propulsion plant prior to getting underway?

Back

Question 1 of 20

5eccefa1bacbc34ba4d472f6

Which of the listed procedures should be followed when raising vacuum on the main propulsion plant prior to getting underway?

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

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