Question 601Steam Plants - Assistant Engineer

70% to pass

When the flow of oil admitted to a disk-type centrifugal purifier is in excess of its designed capacity, which of the following conditions will usually occur?

AThe oil will be discharged through the heavy phase discharge port.

BThe speed of the centrifuge will increase.

CAll water will be retained by the purified oil being discharged.

DOil will be present in the water sealing line to the bowl.

AI Explanation

The correct answer is A) The oil will be discharged through the heavy phase discharge port. When the flow of oil admitted to a disk-type centrifugal purifier exceeds its designed capacity, the increased flow will cause the oil and water layers within the centrifuge to become unbalanced. This will result in the heavier water layer being pushed out through the heavy phase discharge port, along with some of the oil. The other options are incorrect because: B) The speed of the centrifuge will not increase, C) All water will not be retained, and D) Oil may be present in the water sealing line, but this is not the primary effect of exceeding the purifier's designed capacity.