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EO5-Operate Pumping Systems

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About this collection

Videotel questions are grouped by professional topic, including machinery, electrical equipment, fuel and ballast operations. Choose a subject relevant to your preparation.

“Видеотел — Engine Category — EO5-Operate Pumping Systems” contains 145 questions across 1 collection.

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Sample questions and answers

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If the valve wheel of an extended spindle valve is free, but the valve does not seem to be not moving, what would you check first?The source image is unavailable.

One correct answer

  • 1) Whether the valve is dirty.
  • 2) To see if the valve spindle is being turned.✓ Correct answer
  • 3) To see if there is excess pressure on the valve.
  • 4) To check that the valve is not broken.
Before loosening pump covers how should the pressure be checked?The source image is unavailable.

One correct answer

  • 1) Checking the pressure gauge.
  • 2) Open and check vents are clear.✓ Correct answer
  • 3) Remove drain plug.
  • 4) Remove cover slowly.
What would loss of vacuum indicate on a bilge pump?The source image is unavailable.

One correct answer

  • 1) Suction strainer blocked.
  • 2) Bilge empty.✓ Correct answer
  • 3) Pump impeller choked.
  • 4) Discharge valve closed.
What would be the main reason for a centrifugal pump's performance deteriorating over time?The source image is unavailable.

One correct answer

  • 1) Cavitation of the impeller.
  • 2) Excessive wear between impeller and wear ring.✓ Correct answer
  • 3) Wear of the gland neck bush.
  • 4) Wear of the pump housing.
What capacity would you consider most suitable for a ballast pump?The source image is unavailable.

One correct answer

  • 1) 25 to 50 cubic metres/hour.
  • 2) 10 to 15 cubic metres/hour.
  • 3) 20 to 30 cubic metres/hour.
  • 4) 100 to 150 cubic metres/hour.✓ Correct answer

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