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CD4101. Tank Cleaning 1, Introduction and Safety

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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 — CD4101. Tank Cleaning 1, Introduction and Safety” contains 15 questions across 1 collection.

Learning

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Sample questions and answers

These examples come from the published collection. Choose Learning to study questions in sequence, or Exam to check your knowledge.

You have decided to add tank cleaning chemicals to the tank cleaning water. You are washing in a non inert atmosphere. What will you do?

One correct answer

  • Start cleaning with the chemical using hot water
  • Ensure that tank cleaning chemicals are only used if the temperature of the wash water is below 60 degrees Celsius✓ Correct answer
  • It is not allowed to use tank cleaning chemicals on board a non-inerted ship
  • Ensure that the oxygen content of the tank is below 11%
Which event or operation could lead to a charge separation within a tank? (More than one alternative may be correct)

Multiple correct answers

  • Liquid flowing through pipes✓ Correct answer
  • Tank cleaning✓ Correct answer
  • Steaming✓ Correct answer
  • Water and/or air in product✓ Correct answer
Following basic stages will lead to a potential electrostatic hazard.

One correct answer

  • Two different materials rubbing against each other
  • Charge separation, charge accumulation and electrostatic discharge✓ Correct answer
  • Charge separation and electrostatic discharge
  • Charge separation, charge neutralization, electrostatic discharge
When is it safe to clean a tank using steam?

One correct answer

  • When it has either been inerted or cleaned and gas freed✓ Correct answer
  • After a line and bottom flush where the residues have been transferred to a slop tank
  • Before ventilation
  • It is never safe to clean a tank using steam
The fire hazard is controlled by “removing” the oxygen side in the fire-triangle when cleaning an inerted tank. How do we control the fire hazard if the tank is not inerted?

One correct answer

  • By "removing" both the fuel, oxygen, and the sources of ignition
  • By "removing" the sources of ignition
  • By "removing" the fuel
  • By "removing" both the fuel and the sources of ignition✓ Correct answer

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