After completing this course, the licensee should be able to:
• Describe dead-end and recirculating hot water distribution systems.
• List several special considerations involved in chemical pumping systems.
• Define the term viscosity and give examples of high-viscosity materials.
• Describe suction head and suction lift pumping conditions.
• Tell what three elements make up total dynamic head.
• Define static suction head.
• Contrast liquid, brake, and electrical horsepower.
• Tell what information can be gained from pump curves.
• Describe the function of the following: pump casing, shaft, impeller, wear rings, and stuffing box.
• Contrast frame-mounted and close-coupled end- suction pumps.
• Give characteristics of fluids pumped with open, semi-open, and closed impellers.
• Name an advantage and a disadvantage each for stainless steel and brass shaft sleeves.
• Explain the construction of a lineshaft turbine pump.
• Name the two types of flow in a propeller pump.
• Tell the function of diffuser vanes in an axial-flow propeller pump.
• Define electrochemical corrosion and state its cause.
• Describe fluids that can be pumped by a regenerative turbine pump.
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- Approved By: Indiana Department of Environmental Management
Ralph Stevens is a water Subject Matter Expert, licensed in California, Nevada and Arizona as a Grade 3 Wastewater Treatment Plant Operator. Ralph has worked in wastewater for almost 50 years, starting as an operator in a wastewater treatment plant and serving most recently as the Maintenance Reliability Supervisor for the Clark County Water Reclamation District. He is a certified Class Trainer for the California Water Environment Association (CWEA) and has served as the Operations and Maintenance Chairperson for the same organization. He has won a number of awards for his work, including CWEA Electrical and Instrumentation Person of the Year (2015), Safety Plant of the Year (2017), and the WEF Burke Safety Award (2019). Ralph goes out of his way to help and protect staff and the environment.