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CD7050. TOTS 1C-Enclosed Spaces and Tank Atmosphere..

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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 — CD7050. TOTS 1C-Enclosed Spaces and Tank Atmosphere..” contains 27 questions across 1 collection.

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Sample questions and answers

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What use can be made of a combustible gas detector when making a Risk Assessment for tank entry?

One correct answer

  • Testing for hydrocarbon vapours up to the Lower Flammable Limit.✓ Correct answer
  • Testing for toxic gases up to any concentration.
  • Testing for hydrocarbon vapours up to 100% concentration.
  • Testing for oxygen content up to 21%.
How many people should be allowed to enter an enclosed space to carry out routine work?

One correct answer

  • Only the number actually required to carry out the work.✓ Correct answer
  • The number required to carry out the work, plus one extra watchman.
  • Only two people.
  • The number required to carry out the work, plus the person in charge and one extra watchman.
To comply with an Enclosed Space Entry Permit, when must the atmosphere of an enclosed space be tested?

One correct answer

  • Before entry, and at frequent intervals when personnel are in the space.✓ Correct answer
  • In the morning, before daily routine work starts.
  • Every four hours
  • Before entry and after completion of work.
What action should be taken if routine tests indicate the presence of gas while personnel are present in an enclosed space?

One correct answer

  • The personnel should leave the space immediately and contact the Person In Charge or Officer of the Watch.✓ Correct answer
  • The work must be completed as soon as possible and then vacate the space.
  • The gas testing equipment should be checked to verify its accurate.
  • The Watchman should be instructed to bring the breathing apparatus into the space as back up.
What potential hazards would be caused in a machinery space by the release of carbon dioxide for fire extinguishing purposes?

One correct answer

  • A lack of oxygen.✓ Correct answer
  • Carbon dioxide which is toxic to breathe.
  • Vapour, which may reduce visibility.
  • The carbon dioxide gas would be very cold, and could cause severe cold damage to the skin.

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