When the engine room fixed CO₂ system is activated, which of the following actions should be taken FIRST if the automatic fuel oil and ventilation shutoffs have failed to operate?

Question

Accepted Answer

Manually operate the remote shutdown controls.

Answer

Activate an additional CO₂ bottle to increase pressure on the pressure switch plunger.

Answer

Send someone down to manually secure the fuel oil pumps and ventilation fans.

Answer

Discharge extra carbon dioxide into the engine room.

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