Refresher Exit Exam • Set 2 Question 10 of 30

What is NOT a characteristic of carbon dioxide fire-extinguishing agents?

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Direct Answer

Option D: Effective even if ventilation is not shut down

CO2 is effective only if the space is sealed. If ventilation is not shut down, the gas will dissipate, and oxygen will return, allowing the fire to continue.

All Options

Non-corrosive

Will not deteriorate in storage

Effective on electrical equipment

Effective even if ventilation is not shut down (Correct Answer)

Detailed Explanation & Context

CO2 is effective only if the space is sealed. If ventilation is not shut down, the gas will dissipate, and oxygen will return, allowing the fire to continue.

Relevant Framework: STCW 2010 Manila Amendments • DG Shipping E-Learning & Exit Exam Standards • Refresher Course for STCW Modular Courses (Refresher).

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Q1 Which of the listed classes of fire is considered as one involving electrical equipment? Q2 Which of the following would be considered a Class “B” fire? Q3 If ignited, which material would be a class B fire? Q4 Which of the listed extinguishing agents is NOT suitable for fighting a liquid paint fire? Q5 Which extinguishing agent is most effective on a mattress fire? Q6 You are fighting a fire in a watertight compartment using hoses and river water. Stability may be reduced because of: Q7 When used to fight fire, carbon dioxide: Q8 Carbon dioxide as a firefighting agent has which advantage over other agents? Q9 To prevent the spread of fire by convection you should: Q10 What is NOT a characteristic of carbon dioxide fire-extinguishing agents?