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CD7015. TOTS 1A-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 — CD7015. TOTS 1A-Enclosed Spaces and Tank Atmosphere..” contains 19 questions across 1 collection.

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Sample questions and answers

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Why could an unventilated ballast tank fitted with Cathodic Protection contain a hazardous atmosphere?

One correct answer

  • Because hydrogen is produced by the Cathodic Protection.✓ Correct answer
  • Because the Cathodic Protection could produce an oxygen enriched atmosphere.
  • Because hydrocarbons could be produced by the Cathodic Protection.
  • Because the Cathodic Protection would increase the level of nitrogen in the atmosphere.
For what purpose would you use a personal gas detector?

One correct answer

  • To monitor atmospheric conditions during an enclosed space entry.✓ Correct answer
  • To test an enclosed space before starting hot work.
  • To check the atmosphere of an enclosed space before entry.
  • To test the atmosphere of an open space before starting hot work.
How many different locations within a tank should be sampled to test the atmosphere before entering a tank?

One correct answer

  • At various depths, and through as many openings as possible.✓ Correct answer
  • At least three locations.
  • In one position, at a minimum of three levels.
  • As close as possible to the centre of the tank.
What indication will be given by an Explosimeter in case of oxygen deficiency?

One correct answer

  • No indication.✓ Correct answer
  • Approximately 20% of the Lower Flammable Limit
  • Full scale deflection.
  • The indication is erratic and jumpy.
What equipment is required to be kept at the entrance of an enclosed space during entry?

One correct answer

  • A resuscitator, breathing apparatus, a lifeline and a harness, a torch or a lamp.✓ Correct answer
  • Spare tools and parts for the work being undertaken.
  • A resuscitator or escape breathing set.
  • Enough escape breathing sets for all personnel in the space.

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