Tankerman · Inert Gas — P/V Breaker
The pressure/vacuum (P/V) breaker on the inert-gas main is a:
- ACargo pump
- BMooring fitting
- CUllage gauge
- DLiquid-filled last-resort device protecting the tanks from over- and under-pressure✓ Correct
Explanation
The P/V breaker is a liquid (often glycol/water) seal that relieves excessive positive or negative pressure in the IG main if the individual tank P/V valves and other controls fail—protecting tank structure from rupture or implosion.
Authority: SOLAS II-2; ISGOTT
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