🔍 Key Concepts

• EPC Alarm Indications Program Unit panel in the upper-left of the illustration • What condition aboard a purifier system would actually cause the machine to suddenly stop or shake (vibrate) • Difference between an electrical control issue and a mechanical/unbalanced running condition

💭 Think About

• Look at the specific alarm symbol labeled "Emergency stopping or vibrations" and trace what piece of machinery or operating condition it would logically be associated with in a centrifugal purifier system • Ask yourself which choice describes a condition that would make the rotating bowl or drive train suddenly unbalanced or cause it to trip out on a safety device • Decide which options describe normal components or side effects (like water in fuel) versus a fault that would actually trigger an emergency stop circuit

✅ Before You Answer

• Verify which option directly relates to the operation or resetting of an emergency stop circuit or device • Eliminate any choices that describe conditions that would not, by themselves, create sudden strong vibration of the purifier bowl or cause an immediate trip • Check that the remaining choice is consistent with how a centrifugal purifier’s safety shutdown is designed to work, as suggested by the schematic and alarm panel.