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