Water Distribution Operator Class III study plan

Compute flow, velocity, and head loss in distribution mains using the continuity equation and Hazen-Williams relationships, working at least 15 practice problems without references

Sketch a looped distribution network and identify how pipe diameter, length, and roughness affect pressure at each node

Distinguish series, parallel, and looped system behavior and explain how each responds to a demand change

Convert between psi, feet of head, and elevation while tracing a pressure gradient across a service area

Size and locate storage to meet peak-hour, fire-flow, and emergency reserve demands for a sample service area

Calculate the pressure effects of tank water level, elevation, and altitude on system pressure at multiple points

Explain how altitude valves, level controls, and tank turnover interact with distribution pressure management

Diagnose a low-pressure complaint by working backward from the customer meter to the source

Read pump and system curves and identify the operating point, shutoff head, and runout flow

Calculate brake horsepower, wire-to-water efficiency, and energy cost for a given flow, head, and motor rating

Describe cavitation causes and symptoms and state the corrective actions for NPSH problems

Outline startup, shutdown, and valving sequences that protect pumps from deadheading and water hammer

Calculate chlorine dose, demand, and residual for a given water volume and target free chlorine level

Explain CT concept, contact time, and how pH and temperature affect disinfection effectiveness

Identify cross-connection hazards and select the correct backflow prevention method (air gap, RPZ, DCVA, PVB) for at least 10 scenarios

Describe a routine cross-connection control survey and the records it must produce

Sequence a main repair from shutdown and notification through excavation, repair, disinfection, flushing, and return to service

Apply AWWA-style disinfection and bacteriological clearance steps after new main construction or repair

Select pipe, fittings, and repair methods for common failure modes such as corrosion, joint leaks, and breaks

Plan traffic control, utility locating, and confined-space precautions for a repair job

Build a monitoring calendar covering bacteriological, chlorine residual, turbidity, and lead/copper sampling frequencies

Interpret sample results against regulatory limits and determine when repeat or confirmation sampling is required

Explain proper sampling technique, site selection, and chain-of-custody documentation

Draft a monthly operating report summarizing volumes, residuals, sample results, and exceptions

List required personal protective equipment and safe practices for chlorine handling, excavation, and confined-space entry

Outline a boil-water notice and emergency response sequence for a main break, loss of pressure, or contamination event

Describe physical and cyber security measures for tanks, pump stations, and SCADA systems

Practice a hazard assessment for three common field tasks and state controls for each

Complete a full-length timed practice exam and score it against a domain-weighted answer key

Re-teach the three weakest domains using notes, then redo missed problems without looking at solutions

Review formula sheets, unit conversions, and regulatory limits for rapid recall

Finalize a test-day plan covering pacing, question triage, and flagging uncertain items