IG MARITIMEMade by Seafarers for Seafarers

All international training tests on IG MARITIME are free for every seafarer. Register once to save your progress and prepare for your next voyage without limits!

CD7048. TOTS 1C-The Flammability Diagram

Search this section

Choose a question set and start learning or take an exam.

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 — CD7048. TOTS 1C-The Flammability Diagram” contains 47 questions across 1 collection.

Learning

Learning mode has no timer. After answering, you see feedback and the correct options. You can return to a question and repeat a topic.

Exam

A practice exam lasts up to 60 minutes and includes up to 50 questions from the selected collection. Correct answers and results appear after completion.

Sample questions and answers

These examples come from the published collection. Choose Learning to study questions in sequence, or Exam to check your knowledge.

A gas turbine with afterburner will produce similar inert gas to an independent inert gas generator. What level of oxygen might typically be delivered?

One correct answer

  • 1.5-2.5% by volume.✓ Correct answer
  • 5% by volume.
  • 8-10% by volume.
  • Approximately 12% by volume.
If cargo tank openings are opened frequently for operations such as sampling and dipping, inert gas quality may be affected. How so?

One correct answer

  • Air could enter the tanks through the openings.✓ Correct answer
  • Inert gas would escape, lowering the tank pressure.
  • Moisture from the atmosphere could enter the tank.
  • The hydrocarbon content of the tank atmosphere would be increased.
With reference to the Flammability Diagram, if a cargo tank atmosphere was at point F, what would be the effect of diluting with fresh air?

One correct answer

  • The hydrocarbon concentration would be reduced, and the oxygen level increased, taking the atmosphere into the Flammable Range.✓ Correct answer
  • The hydrocarbon concentration would be reduced, and the oxygen level increased, resulting in a safe tank atmosphere.
  • The oxygen level would be increased, resulting in a safe tank atmosphere.
  • The hydrocarbon concentration would be increased, taking the atmosphere into the Flammable Range.
With reference to the Flammability Diagram, what conditions are shown at point B?

One correct answer

  • The tank atmosphere is too rich to support combustion.✓ Correct answer
  • The tank atmosphere is too lean to support combustion.
  • The hydrocarbon gas concentration is at its Upper Flammable Limit.
  • The hydrocarbon gas concentration is at its Lower Flammable Limit.
Why is an oxygen content of not more than 8% considered to be the safe limit in a cargo tank atmosphere?

One correct answer

  • Because the atmosphere is safely outside the Flammable Range.✓ Correct answer
  • Because 8% hydrocarbon gas is below the Lower Flammable Limit.
  • Because 8% hydrocarbon gas is above the Upper Flammable Limit.
  • Because the tank atmosphere was outside the Flammable Range at the time the readings were taken.

Before you start

Do I need to register to start?

Guest access lasts 23 minutes. Free registration lets you continue without limits, save progress and review mistakes in your account.

What language are the questions in?

Questions and answer options retain the language of the original bank. You can change the interface language separately.

Can I use my result as an official document?

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