Question 240General Subjects - Assistant Engineer

The correct answer is C) oil/water interface level sensing probe. The oil/water interface level sensing probe is used to detect the level of the interface between the oil and water layers in a separator vessel. This is a critical component for ensuring proper operation and preventing oil from being discharged overboard. The other options are not the correct identification for the component labeled "A" in the illustration. The oil content monitor probe (A) measures the oil content of the effluent, the separator vessel pressure relief valve (B) is a safety device, and the separator vessel vacuum breaker (D) is used to prevent implosion of the vessel. None of these match the description of the component labeled "A" in the illustration.