Each inert gas system gas main must have an automatic shut down valve at the outlet of the gas production plant. This valve must close automatically upon __________.

Correct Answer: Option A — blower failure

The automatic shutdown valve at the gas production plant outlet must close immediately upon blower failure. This prevents the backflow of hazardous hydrocarbon vapors from the cargo tanks into the machinery spaces, complying with 46 CFR 32.53 and SOLAS requirements.