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Liquefied Natural Gas (LNG) as Fuel Bunkering Operations

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About this collection

MINTRA CET includes short topic-based sets such as incident investigation, accommodation safety, anchoring operations and firefighting. Study an individual module, then review your mistakes in your account.

“MINTRA CET — Liquefied Natural Gas (LNG) as Fuel Bunkering Operations” contains 20 questions across 1 collection.

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Sample questions and answers

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How can the “dry disconnect” process be achieved?

Multiple correct answers

  • By draining or inerting the system, so that no LNG vapour is present before disconnection.✓ Correct answer
  • By top spraying and filling in the receiving tanks to provide cooling and avoid the occurrence of BOG.
  • Using dry connect and disconnect couplings, which close in any LNG vapour before disconnection.✓ Correct answer
Match the following zones to their correct description. External Zone:

One correct answer

  • In this zone risk of a flammable atmosphere is present at all times, this is an area directly around the bunkering area.
  • This zone extends beyond the hazardous zone and has further precautions due to the nature of LNG if spilled.
  • This zone ensures passing traffic does not affect the safety of the operation. Assistance may be required from the port to enforce.
  • This zone is where other shipboard activities and SIMOPS are monitored to ensure there is no encroachment of the safety zone.
  • This zone is a large area that is intended to protect public access as per local regulations.✓ Correct answer
What is the flashpoint of LNG when it is returned to vapour?

One correct answer

  • Minus 188 degrees Celsius.✓ Correct answer
  • 537 degrees Celsius.
  • Minus 160 degrees Celsius.
Which of the following describes LNG?

Multiple correct answers

  • Colourless.✓ Correct answer
  • Odourless.✓ Correct answer
  • Black in colour.
  • Non-corrosive.✓ Correct answer
  • Toxic.
What area of guidance does The International Safety Guide for Oil Tankers and Terminals (ISGOTT) provide for bunkering LNG as fuel operations?

Multiple correct answers

  • Risk assessments.✓ Correct answer
  • Vapour and pressure control.✓ Correct answer
  • Process and procedures.✓ Correct answer
  • Control zones.✓ Correct answer
  • Personnel training requirements.

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