What is the expected outcome if product flows through the sight glass during unexpected diversion?

When product flows through the sight glass during unexpected diversion, it suggests a malfunction in the system. The sight glass is typically designed to provide visibility into the process and confirm that the product is moving correctly through the system. If flow is observed through the sight glass when it is not expected, this could indicate that there is a failure in the diversion mechanism or that the system is not operating as designed. This situation often requires immediate attention to prevent potential contamination or product loss, as it disrupts the intended flow path and can compromise the process integrity.

On the other hand, the other options imply normal operation or efficiency, which would not align with the observation of unexpected flow. Any abnormal flow through the sight glass must be addressed, making the identification of such an issue crucial for maintaining product quality and safety.