MN Water Operator study plan

Draw and label a complete surface-water treatment train from raw intake to finished-water storage, naming each unit process in order

Explain the coagulation-flocculation-sedimentation sequence, listing the coagulant chemicals, typical dose ranges, mixing intensities, and the operating parameters that trigger adjustment

Interpret a jar test: describe how to run one, what the results show, and how to translate the winning jar into a plant dose change

Identify the four conventional filtration modes (filtration, backwash, filter-to-waste, ripening) and list the turbidity and head-loss triggers for backwashing

List the residual streams a conventional plant produces and state how each is thickened, dewatered, or discharged

Describe iron and manganese removal, aeration, and softening (lime-soda and ion exchange) trains used on Minnesota groundwater supplies

Calculate brake horsepower, water horsepower, and motor horsepower from flow, head, and efficiency, working at least 10 problems

State the affinity laws for flow, head, and power and apply them to predict a pump's new operating point after a speed change

Define NPSH-available and NPSH-required, then compute NPSH-available for a given suction lift, altitude, and water temperature

Compare pump types (centrifugal, submersible, positive displacement, vertical turbine) and match each to its typical distribution or treatment duty

Read a pump performance curve: identify shutoff head, runout, best efficiency point, and the system curve intersection

Compute head loss through pipe using the Hazen-Williams relationship and the friction-loss tables for a given flow, diameter, and C-factor

Sequence a pump start-up, shutdown, and rotation check, including valve positions, priming, and seal/venting steps

Diagnose four common pump and motor faults (cavitation, air binding, worn impeller, misalignment) from symptoms and state the corrective action

Explain motor protection and control topics: overloads, across-the-line versus reduced-voltage starting, VFD operation, and phase/voltage imbalance checks

Map a distribution system: trace source to storage to pressure zone, and explain how elevated tanks, hydropneumatic tanks, and booster stations maintain pressure

Identify pipe materials (cast iron, ductile iron, PVC, HDPE, asbestos-cement, copper, lead service line) and state the handling, joining, and corrosion concerns for each

Compute flow, velocity, and pressure conversions among psi, feet of head, and gpm for typical main sizes

Describe main flushing, valve exercising, hydrant inspection, and leak-detection programs, including how to record results

Explain cross-connection control: identify backflow hazards, distinguish back-siphonage from backpressure, and state where RPZ, DCVA, and PVB assemblies are required

Walk through a water main repair and disinfection sequence: shutdown and notify, excavation and shoring, cut and repair, flushing, chlorination, bacteriological sampling, and return to service

Describe tapping a live main, installing a service line, and pressure-testing and disinfecting new main per standard practice

Calculate storage volume and fire-flow demand against a peaking factor, and explain how sizing decisions set pressure-zone boundaries

Re-solve five mixed pump and distribution problems combining head loss, static head, and pressure at the customer's tap

Explain free chlorine and chloramine chemistry: demand, breakpoint, residual measurement, and how pH and temperature shift disinfection effectiveness

Calculate CT (residual concentration times contact time) for a given basin and compare it to the required CT for the target pathogen and log inactivation

List regulated and unregulated disinfection byproducts, their formation drivers, and the operational levers (precursor removal, pH, chloramine conversion) used to control them

Describe the bacteriological sampling routine: total coliform and E. coli method, sample site selection, aseptic technique, holding time, and what triggers repeat and triggered samples

Identify the other required monitoring parameters (turbidity, nitrate, lead and copper, SOCs and VOCs, radionuclides) and their sampling frequency and reporting deadline

Interpret a lab result that exceeds a limit: state the confirmation steps, public-notice tier, and the timeline for each tier

Explain proper chlorine gas and hypochlorite safety: cylinder handling, leak response, ventilation, and the neutralization or evacuation decision

Apply confined-space entry rules: permit, atmospheric testing order, attendant duties, rescue plan, and non-entry retrieval

Apply excavation and trenching rules: protective system thresholds, spoil placement, access and egress, and utility locating

Assemble the recordkeeping set: daily operational log entries, MOR or monthly report contents, chain-of-custody forms, and the operator certification and continuing-education requirements

Complete two full-length timed practice exams covering all five domains and review every missed item back to its source concept

Re-teach your three weakest topics out loud from a blank page without notes

Recompute the ten calculation types that appear across domains (dose, detention time, CT, horsepower, head loss, velocity, pressure conversion, storage, flow, loading rate) from memory

State the safety, regulatory, and recordkeeping rules most likely to be tested in one consolidated one-page summary