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CD0093. Wall Wash

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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 — CD0093. Wall Wash” contains 65 questions across 1 collection.

Learning

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Exam

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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.

The dish used in a shore laboratory Non-Volatile Matter test is commonly made from:

One correct answer

  • Potassium.
  • Stainless steel.
  • Platinum.✓ Correct answer
  • Teflon coated metal.
(Select all applicable answers) If you do not pay enough attention to the exact requirements of the Customer’s wall wash specification, which of the following may result?

Multiple correct answers

  • Over-cleaning.✓ Correct answer
  • Unnecessary over use of cleaning chemicals.✓ Correct answer
  • Wasted time and manpower.✓ Correct answer
  • Tendering of a tank that does not meet the required standard.✓ Correct answer
Hot bulkheads should be avoided for wall wash because:

One correct answer

  • Of safety concerns.
  • Of the high evaporation rate of the Methanol.✓ Correct answer
  • ASTM specifications require the bulkhead to be between 15°C and 25°C.
  • Accurate analysis is dependent on temperature at the time of wall wash in the tank.
Soapy bubbles noted on the top of a wall wash sample in a test tube are a likely indication of:

One correct answer

  • Residues from an oil based cleaning agent.
  • Residues of a water based cargo.
  • Residues from a detergent based cleaning chemical.✓ Correct answer
  • Acetone.
Which of the following is unlikely to be the source of Hydrocarbons found in wall wash analysis?

One correct answer

  • Previous cargo.
  • Equipment failure.
  • Inhibitor.✓ Correct answer
  • Staining from Inert Gas.

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