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GASCO Exit Exam • Set 1 Question 19 of 30

What device is installed on gas carrier vents to prevent flame propagation into cargo tanks?

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Direct Answer

Option B: Flame screen or flame arrestor

Flame screens or arrestors are mandatory safety devices installed on cargo tank vents to prevent the propagation of external flames into the tank atmosphere. By quenching the flame front, these devices mitigate the risk of internal tank explosions, complying with IGC Code requirements for cargo system safety.

All Options

A
Orifice plate
B
Flame screen or flame arrestor (Correct Answer)
C
Butterfly valve
D
Non-return flap

Detailed Explanation & Context

Flame screens or arrestors are mandatory safety devices installed on cargo tank vents to prevent the propagation of external flames into the tank atmosphere. By quenching the flame front, these devices mitigate the risk of internal tank explosions, complying with IGC Code requirements for cargo system safety.

Relevant Framework: STCW 2010 Manila Amendments • DG Shipping E-Learning & Exit Exam Standards • Advanced Training for Liquefied Gas Tanker Cargo Operations (GASCO).

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