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CD0007. Inert Gas Generator

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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 — CD0007. Inert Gas Generator” contains 70 questions across 1 collection.

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Sample questions and answers

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What is the SOLAS requirement regarding non-return devices in the inert gas main for inert gas systems on oil tankers?

One correct answer

  • There must be at least two devices one of which should be a water seal type.✓ Correct answer
  • There must be at least two water seal type devices fitted.
  • There must be at least two neither of which should be a water seal type.
  • As long as there is a water seal no other devices are required
When considering an independent, oil fired inert gas generator suitable for service onboard an oil tanker what are the SOLAS requirements for the oxygen content of the inert gas supply?

One correct answer

  • A maximum of 5%.✓ Correct answer
  • A maximum of 8%.
  • A maximum of 11%.
  • A maximum of 3%.
When considering the automatic operation of an independent inert gas generator the start up sequence normally has delays built in to ensure correct timing of the sequence. For example there will be a delay in the sequence to ensure sufficient furnace purging time. How can these delays be ensured in manual mode?

One correct answer

  • By the use of timed interlocks which operate even in the manual mode.✓ Correct answer
  • The operator is relied upon to ensure the correct timing of the sequence.
  • The delays are only an extra safety precaution so it doesn’t matter if they missed out.
  • There is no need for any delays if the operator is in attendance during start up.
When considering an independent, oil fired inert gas generator, other than providing a vent to the atmosphere during start up of the plant, what is the other main purpose of the automatic atmospheric vent valve?

One correct answer

  • It is used in conjunction with the inert gas main valve to regulate the pressure in the inert gas main.✓ Correct answer
  • It acts as an inlet for fresh air to the system when gas freeing.
  • It acts as the main relief device in the event of overpressure.
  • It is used to control the capacity of the inert gas generator.
Which of the given options is the one that will most influence the combustion efficiency for the burner type described in this module?

One correct answer

  • Distance from the main burner tip to the edge of the air cone.✓ Correct answer
  • Distance from main burner tip to pilot burner tip
  • Distance from pilot burner tip to igniter.
  • Distance from pilot burner tip to edge of air cone.

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