NEIEP Mechanics Practice Exam

When a pump produces a hammering noise, it's indicative of a possible issue with the fluid dynamics, which can often be related to lubrication and the condition of the pumping system. Checking the oil in the reservoir is a critical first step because inadequate lubrication can cause various operational problems, including cavitation, which may manifest as a hammering or knocking sound. Proper lubrication ensures that the moving parts are adequately protected, reducing friction and heat generation.

If the oil level is low or the oil is contaminated, it can lead to increased wear and potential failure of the pump components. Therefore, verifying the oil condition and levels addresses a fundamental aspect of pump operation and helps in diagnosing the root cause of the hammering noise. Addressing the lubrication issue may resolve the hammering without necessitating further complicated interventions like adjusting pressure settings or replacing the pump itself.