A knocking sound emitted from an unloaded air compressor is probably caused by __________.
β’ how piston movement changes when there is no air load (unloaded compressor) β’ typical symptoms of valve problems vs lubrication problems vs loose components β’ which condition would create an intermittent mechanical impact sound rather than a hiss or squeal
β’ Think about what parts inside a compressor actually "knock" against each other when there is extra clearance or looseness. β’ Consider how an unloaded compressor (little or no pressure resistance) changes the forces on the piston and connecting parts. β’ For each choice, imagine the sound you would expect: would it be a sharp knock, a continuous hiss, or a squeal/overheating symptom?
β’ Be clear on the difference between a mechanical impact noise (knock) and an airflow/pressure noise (hiss or whoosh). β’ Ask which option would be most affected when the compressor is unloaded versus loaded. β’ Verify which condition is most likely to get worse if the moving part has excess clearance or looseness.
No comments yet
Be the first to share your thoughts!