Refresher Exit Exam • Set 2 Question 5 of 30

Which extinguishing agent is most effective on a mattress fire?

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Direct Answer

Option B: Water

Water is the most effective agent for mattress fires because it penetrates deep into the material to cool the seat of the fire, preventing deep-seated re-ignition.

All Options

Dry Chemical

Water (Correct Answer)

Foam

CO2

Detailed Explanation & Context

Water is the most effective agent for mattress fires because it penetrates deep into the material to cool the seat of the fire, preventing deep-seated re-ignition.

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?