AFF Exit Exam • Set 2 Question 19 of 30

What safety feature prevents accidental discharge of fixed CO2 fire extinguishing systems?

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Direct Answer

Option B: Double-valve protection with pilot control and alarm trip switches in locked release cabinets

FSS Code, Chapter 5, mandates that fixed CO2 systems must have double-valve protection to prevent accidental discharge. This involves a primary control valve and a secondary release valve, typically housed in a locked cabinet with alarm interlocks, ensuring that the system is only activated intentionally during a confirmed emergency.

All Options

A

Automatic trigger at 30°C

B

Double-valve protection with pilot control and alarm trip switches in locked release cabinets (Correct Answer)

C

Threaded cap on main discharge pipe

D

Single push button on the bridge

Detailed Explanation & Context

FSS Code, Chapter 5, mandates that fixed CO2 systems must have double-valve protection to prevent accidental discharge. This involves a primary control valve and a secondary release valve, typically housed in a locked cabinet with alarm interlocks, ensuring that the system is only activated intentionally during a confirmed emergency.

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

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