What sound typically indicates that cavitation is occurring?

Cavitation is a phenomenon that occurs in pumps and other hydraulic systems where low pressure leads to the formation of vapor bubbles. When these bubbles collapse or implode, they create shock waves, which can produce distinctive sounds. The correct answer describes this characteristic noise as a loud banging, resembling hammering on the impeller.

This loud banging noise occurs due to the rapid pressure changes caused by the collapse of these vapor bubbles, which can strike the impeller and surrounding components with significant force. The intensity of this sound reflects the severity of the cavitation and serves as a warning sign that the pump may be operating under conditions that could lead to damage.

Other sounds, such as a low humming noise or a continuous whirring sound, do not signify cavitation. Instead, they may indicate normal operational sounds or other forms of mechanical issues not related to cavitation. The high-pitched squealing might suggest something different, such as a problem with the bearings or the belt slippage in mechanical systems. Understanding these sounds and their implications is crucial for monitoring pump health and preventing damage due to cavitation.