Question 149General Subjects - 1st Asst/Chief

The correct answer is D) oil/water interface level sensing probe. The oil/water interface level sensing probe is the component labeled "A" in the illustration GS-0175. This probe is responsible for detecting the level of the interface between the oil and water layers within the separator vessel, which is a critical component in oil/water separation systems. The other answer choices are incorrect because they do not accurately describe the function of the component labeled "A" in the illustration. The oil content monitor probe, separator vessel pressure relief valve, and separator vessel vacuum breaker are all different components with distinct purposes within the oil/water separation system.