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CD0416. Fuel oil bunkering, Understanding test results

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About this collection

The Seagull CBT bank is organised into modules covering safety, shipboard operations, maintenance and other topics. Original module names and codes are retained to help you find the topic you need.

“Seagull CBT — CD0416. Fuel oil bunkering, Understanding test results” contains 22 questions across 1 collection.

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Sample questions and answers

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According to this module, if distillate fuel onboard is found to have a high Acid number, what should you do?

One correct answer

  • Send a sample to a specialist testing agency to check for corrosion and/or chemical contamination.✓ Correct answer
  • Increase the rate of cylinder lubrication oil feed, and keep the main engine cooling water temperatures high.
  • Add an alkali to the fuel.
  • Water-wash the fuel using the separators.
Why are catalytic fines so problematic when present in residual fuel oil? Select the ONE correct answer.

One correct answer

  • They are small and difficult to remove, but very hard and cause rapid wear of engine parts.✓ Correct answer
  • They cannot be burned and therefore lead to sticky deposits in the combustion chambers of the engine.
  • They are an indication that the fuel has not been completely refined and may therefore give poor combustion.
  • They are an indication that the fuel oil has been contaminated with other waste oils, such waste lubricating oil, which will give poor combustion.
Why is the Micro Carbon Residue of a distillate fuel important? Select the ONE correct answer.

One correct answer

  • It is a measure of how much energy is released when the fuel is completely burned.
  • It is an indication of how likely it is that filters will be clogged, or need to be changed or back-flushed.
  • It is a measure of how abrasive the deposits left in the engine cylinder will be.
  • High levels result in more carbonaceous deposits in the engine.✓ Correct answer
The condition of distillate fuels can often be quickly assessed by a visual inspection of the sample, which should be bright and clear. At what temperature should this test be carried out? Select the ONE correct answer.

One correct answer

  • Between 10 and 25 degrees Celsius.✓ Correct answer
  • The sample should be cooled to below 10 degrees Celsius.
  • The sample should be warmed to at least 30 degrees.
  • The sample should be warmed to within 10 degrees Celsius of its closed flash point.
According to this module, how should Type 2 and 3 ECA compliant fuels be treated? Select the ONE correct answer.

One correct answer

  • They should be treated as residual heavy fuel oil of corresponding grade, particularly with regard to heating.✓ Correct answer
  • They should be treated as distillate fuels.
  • They should not be heated in storage.
  • They should not be centrifuged, as this causes the constituents to separate.

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