FPFF Exit Exam • Set 4 Question 12 of 30
Why is it important that you tend the nozzle carefully when you have finished using a fire extinguisher containing carbon dioxide?
✓
Direct Answer
Option C: Because the nozzle gets extremely cold, making it impossible to use.
The rapid expansion and vaporization of liquid CO2 upon discharge causes the extinguisher horn and nozzle to reach cryogenic temperatures (-78.5°C), creating a risk of severe cold burns if touched without insulated grips.
All Options
A
This is not a requirement
B
Because the nozzle gets extremely hot making it impossible to use
C
Because the nozzle gets extremely cold, making it impossible to use.
(Correct Answer)
D
Because the nozzle gets warm, making it impossible to use
Detailed Explanation & Context
The rapid expansion and vaporization of liquid CO2 upon discharge causes the extinguisher horn and nozzle to reach cryogenic temperatures (-78.5°C), creating a risk of severe cold burns if touched without insulated grips.
Relevant Framework: STCW 2010 Manila Amendments • DG Shipping E-Learning & Exit Exam Standards • Fire Prevention & Fire Fighting (FPFF).
Advertisement
Practice Full FPFF Set 4
Test yourself with 30 interactive questions, live timer, and instant score.