Question 622Steam Plants - Assistant Engineer

The correct answer is A) non-existent. In the operation of a lube oil clarifier, the position of the oil/water interface should be non-existent. This is because the purpose of a lube oil clarifier is to separate the oil and water components completely, producing a pure oil stream with no water content. The clarifier uses centrifugal force to achieve this separation, and the design should be such that the oil and water phases are fully separated with no discernible interface between them. The other answer choices are incorrect because they do not accurately describe the proper operation of a lube oil clarifier. The position of the oil/water interface is not maintained by the number of disks, the ring dam, or the diaphragm-type weir control valve. These components are designed to facilitate the complete separation of the oil and water phases, not to control the position of the interface between them.