Certified Water/Wastewater Maintenance Technician III (CWWMT-III)
Test Content & Lesson Curriculum
| Unit 204 | Electrical Measuring Instruments – Covers the principles on which electrical test instruments operate. Basic instruments covered include voltmeter, ammeter, wattmeter, ohmmeter, and meg ohmmeter. Covers AC metering, split-core ammeter, use of current and potential transformers. Includes detailed coverage of modern multi-meters. Explains functions and uses of oscilloscopes. |
| Lesson 1: Principles of Meter Operation Lesson 2: Ammeters, Voltmeters and Watt Meters Lesson 3: Resistance Meters Lesson 4: Multi-meters Lesson 5: Oscilloscopes |
|
| Unit 208 | Operating & Maintaining Three Phase Motors – Covers three-phase motor principles for induction, synchronous, and multi-speed dual voltage motors. Gives recommended maintenance practices for large AC motors. Covers principles of three phase motor starters, part winding, reversing, jogging, alternator principles and operation. Describes three phase power distribution. |
| Lesson 1: Principles of Three Phase Motors Lesson 2: Induction Motors Lesson 3: Synchronous Motors Lesson 4: Multi-speed Motors Lesson 5: Maintaining Three Phase Motors Lesson 6: Motor Starters Lesson 7: Three-Phase Motor Controllers Lesson 8: Alternators Lesson 9: Auxiliary Generator Systems Lesson 10: Power Distribution Systems |
|
| Unit 209 | AC Control Equipment – Covers the broad range of industrial motor starting and control equipment, including NEMA sizes and ratings. Includes pushbutton control stations, limit switches, mercury switches, mechanical and magnetic plugging, foot switches, and pressure, temperature, and float switches. Covers control panel wiring and special applications. |
| Lesson 1: Motor Starters Lesson 2: Switches and Controls Lesson 3: Limit Switches Lesson 4: Special Control Switches Lesson 5: Timers and Counters Lesson 6: Control Relays Lesson 7: Equipment for Hazardous Locations Lesson 8: Special Motor Controls Lesson 9: Motor Control Centers Lesson 10: Control Panel Wiring |
|
| Unit 308 | Developing Hydraulic Troubleshooting Skills – Covers understanding the systems, using schematic diagrams, installation procedures, cleanliness and safety. Includes tubing cutting, bending, and flaring, identification and selection of proper fluid, and charging the system. Discusses planned maintenance specific repair/replacement recommendations, system diagnosis, and troubleshooting. |
| Lesson 1: Hydraulic Systems Lesson 2: Hydraulic Schematic Diagrams Lesson 3: Installing Hydraulic Components Lesson 4: Installing Piping and Tubes Lesson 5: Selecting Hydraulic Fluids Lesson 6: Planning System Maintenance Lesson 7: Troubleshooting Systems Lesson 8: Troubleshooting Valves Lesson 9: Troubleshooting Cylinders Lesson 10: Troubleshooting Pumps and Motors |
|
| Unit 310 | Developing Pneumatic Troubleshooting Skills – Covers pneumatic systems, schematic symbols and diagrams, installing system components, planned maintenance, system diagnosis, and troubleshooting. Includes maintenance of air compressors, control valves, air motors, electrical components and hybrid systems. |
| Lesson 1: Pneumatic Systems Lesson 2: Pneumatic Schematic Diagrams Lesson 3: Installing of System Components Lesson 4: System Maintenance Lesson 5: Determining System Failures Lesson 6: Troubleshooting Air Lesson 7: Troubleshooting Control Valves Lesson 8: Troubleshooting Cylinders Lesson 9: Troubleshooting Air Motors Lesson 10: Pneumatic and Hydraulic System |
|
| Unit 342 | Mechanical and Fluid Drive Systems – Covers further details of Drives Maintenance, Including brakes, clutches, and adjustable-speed drives. Also covers maintenance and Troubleshooting of fluid drives and package drives. |
| Lesson 1: Mechanical Brakes and Clutches Lesson 2: Electric Brakes and Clutches Lesson 3: Adjustable-Speed Drives Lesson 4: Fluid Drives Lesson 5: Complete Drive Systems |
|
| Unit 343 | Bearing and Shaft Seal Maintenance – Covers plain bearings, their parts, dimensions, functions, and relining techniques. Continues with installation and replacement of antifriction bearings. Also covers linear motion bearings and shaft seals. |
| Lesson 1: Plain Bearings Lesson 2: Installing Antifriction Bearings Lesson 3: Removing & Replacing Antifriction Bearings Lesson 4: Mounted Antifriction Bearings Lesson 5: Linear Motion Bearings and Shaft seals |
|
| Unit 344 | Pump Installation and Maintenance – Covers basic pumping concepts. Describes required maintenance of packing and seals. Covers maintenance and overhaul of centrifugal pumps. Concludes with maintenance of rotary pumps. |
| Lesson 1: Basic Pumping Concepts Lesson 2: Maintaining Packing and Seals Lesson 3: Maintaining Centrifugal Pumps Lesson 4: Overhauling Centrifugal Pumps Lesson 5: Maintaining Rotary Pumps |
|
| Unit 345 | Maintenance Pipefitting – Covers components and terminology used in piping used in piping systems. Also covers terminology, measurement, and maintenance of threaded, welded and plastic piping systems. Explains the use of pipefitting accessories, supports, traps, filters and strainers and expansion joints. |
| Lesson 1: Piping Dimensions and Terminology Lesson 2: Threaded Piping Systems Lesson 3: Welded Piping Systems Lesson 4: Plastic Piping Systems Lesson 5: Pipefitting Accessories |
|
| Unit 346 | Tubing and Hose System Maintenance – Covers tubing specifications, materials and fittings. Explains procedures used for handling, bending, cutting and installing tubing. Gives basics of tubing in hydraulic systems. Describes hose systems and their functions. Concludes with gaskets, sealants, and adhesives. |
| Lesson 1: Tubing Fundamentals Lesson 2: Installing Tubing Lesson 3: Hydraulic Tubing Systems Lesson 4: Hose Systems Lesson 5: Gaskets, Sealants, and Adhesives |
|
| Unit 347 | Valve Maintenance and Piping System Protection – Covers maintenance and operation of gate, globe, ball, plug, check, and special-purpose valves. Details actuators and various accessories. Explains valve selection based on application. Describes methods of protecting piping systems. |
| Lesson 1: Valve Maintenance Lesson 2: Special Valves Lesson 3: Actuators and Accessories Lesson 4: Valve Inspection Lesson 5: Piping System Protection |
|
| Unit 418 | Oxyfuel Operations – Covers the welding of ferrous and nonferrous metals. Describes oxygen cutting as well as brazing and soldering. Discusses surfacing techniques. |
| Lesson 1: Welding Ferrous Metals Lesson 2: Welding Nonferrous Metals Lesson 3: Oxygen Cutting Lesson 4: Brazing and Soldering Lesson 5: Surfacing Techniques |
|
| Unit 419 | Arc Welding Operations – Covers shielded metal arc welding, selecting electrodes for SMAW, gas metal and tungsten arc welding, preheating, reheating, welding ferrous and nonferrous metals, pipe welding, hard facing, and rebuilding. |
| Lesson 1: Shielded Metal Arc Welding Lesson 3: Gas Metal Arc Welding Lesson 4: Gas Tungsten Arc Welding Lesson 5: Other Welding Processes Lesson 6: Preheating and Postheating Lesson 7: Welding Nonferrous Metals Lesson 8: Pipe Welding Lesson 9: Hard Facing and Rebuilding |