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CD0047. Fuel Combustion Efficiency

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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 — CD0047. Fuel Combustion Efficiency” contains 32 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.

How will a large content of “Cat fines” in the fuel influence the injection timing?

One correct answer

  • Cat fines will improve the fuel quality and lead to early injection
  • Cat fines will have no influence on the injection and combustion
  • Cat fines will improve the atomisation and thus the combustion
  • Abrasive wear of pumps and valves will lead to late injection✓ Correct answer
You have received a fuel with poor ignition quality, which of the following would you do?

One correct answer

  • Collective adjustment towards more late injection
  • Change the Pump index
  • Collective adjustment towards more early injection✓ Correct answer
  • Mix the fuel with additives
A too late combustion leads to?

One correct answer

  • Decreased exhaust gas temperature
  • No change in exhaust gas temperature
  • Reduced soot formation and cleaner turbo chargers
  • Increased exhaust gas temperature✓ Correct answer
The maximum cylinder pressure will be higher than normal when?

One correct answer

  • You have a late injection of fuel
  • The fuel valve opening pressure is too high
  • You have an early injection of fuel✓ Correct answer
  • You have a leaking fuel valve
What do we mean by the expression after burning?

One correct answer

  • The fuel valves are leaking and the combustion continue
  • Some fuel will continue to burn until the exhaust gas has passed the exhaust boiler
  • The fuel is ignited twice to obtain a more clean combustion
  • When the combustion continues after the injection has ended✓ Correct answer

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No. This is independent practice. A result does not replace an examination, certificate or knowledge check by an authorised organisation.