AFF Exit Exam • Set 4 Question 1 of 30

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

✓

Direct Answer

Option B: Effective even if ventilation is not shut down

Carbon dioxide is not effective if ventilation is not shut down, as its extinguishing action relies on displacing oxygen and cooling. The other listed characteristics—stability, non-corrosiveness, and effectiveness on electrical fires—are indeed advantages of CO2.

All Options

A

Will not deteriorate in storage

B

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

C

Effective on electrical equipment

D

Non-corrosive

Detailed Explanation & Context

Carbon dioxide is not effective if ventilation is not shut down, as its extinguishing action relies on displacing oxygen and cooling. The other listed characteristics—stability, non-corrosiveness, and effectiveness on electrical fires—are indeed advantages of CO2.

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

Practice Full AFF Set 4

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 4

View All 30 →

Q1 What is NOT a characteristic of carbon dioxide fire-extinguishing agents? Q2 In a fixed carbon dioxide extinguishing system for a machinery space, designed WITH a stop valve in the line leading to the protected space, the flow of CO2 is established by actuating: Q3 An important step in fighting any electrical fire is to: Q4 Which fire detection system is actuated by sensing a heat rise in a compartment? Q5 Water fog is an effective firefighting agent because it: Q6 A fire of escaping liquefied flammable gas is best extinguished by: Q7 When combating a Class C fire, which of the following dangers may be present? Q8 The lowest temperature at which the vapors of a flammable liquid will ignite and cause self-sustained combustion in the presence of a spark or flame is the: Q9 The fire protection provided for the propulsion motor and generator of a diesel-electric drive vessel is usually a: Q10 Metal fires should be fought using which extinguisher type?