AFF Exit Exam • Set 3 Question 13 of 30

You are releasing carbon dioxide gas (CO2) into an engine compartment to extinguish a fire. The CO2 will be most effective if the:

✓

Direct Answer

Option C: compartment is closed and airtight

To extinguish a fire with CO2, the compartment must be sealed to contain the gas, thereby reducing the oxygen concentration to a level below that required for combustion. Increasing air flow or leaving the compartment open would disperse the CO2, rendering it ineffective.

All Options

A

compartment is closed and ventilators are opened

B

air flow to the compartment is increased with blowers

C

compartment is closed and airtight (Correct Answer)

D

compartment is left open to the air

Detailed Explanation & Context

To extinguish a fire with CO2, the compartment must be sealed to contain the gas, thereby reducing the oxygen concentration to a level below that required for combustion. Increasing air flow or leaving the compartment open would disperse the CO2, rendering it ineffective.

Relevant Framework: STCW 2010 Manila Amendments • DG Shipping E-Learning & Exit Exam Standards • Advanced Fire Fighting (AFF).

Practice Full AFF Set 3

Test yourself with 30 interactive questions, live timer, and instant score.

Launch Practice Simulator →

Question Discussion & Notes

0

Have a doubt, memory trick, or exam update? Share your insights with fellow mariners.

Loading mariner discussions...

« Previous Question Next Question »

More Questions in AFF Set 3

View All 30 →

Q1 Flue gases are used directly for inerting? Q2 In fighting a fire in a fuel tank, the first action you should attempt is to: Q3 The FIRST course of action in fighting a fire in a cargo or fuel oil tank is to: Q4 Three side of fire triangle are fuel, heat and ............? Q5 Why should not carbon dioxide extinguisher be used in accommodation space: Q6 In a fixed CO2 fire extinguishing system where pressure from pilot cylinders is used to release the CO2 from the main bank of cylinders, the number of required pilot cylinders shall be at least: Q7 Fixed CO2 systems would not be used on crew's quarters or: Q8 Your vessel is equipped with a fixed CO2 system and a fire main system. In the event of an electrical fire in the engine room what is the correct procedure for fighting the fire? Q9 When pilot cylinder pressure is used as a means to release the CO2 from a fixed fire extinguishing system consisting of four storage cylinders, the number of pilot cylinders shall be at least: Q10 After extinguishing a paint locker fire using the fixed CO2 system, the next action is to have the space: