Entry-Level Water Distribution
A complete prep course built around the standard entry-level distribution exam outline: regulations and operator certification under the Safe Drinking Water Act, distribution operation and maintenance, disinfection and chlorine residual, hydraulics and pumps, sampling and water quality, safety, and applied distribution math. Includes a diagnostic assessment, mode-switching practice engine, math drills with worked solutions, and a full timed practice exam.
10
Practice questions
50
Exam questions
90 min
Timed exam
6
Math drill types
Exam outline and weighting
Passing score for this exam is 70%. Topic weights below match how the exam distributes its questions.
Regulations & Operator Certification
15% of exam · 2 questionsSafe Drinking Water Act requirements, EPA and primacy agency rules, MCLs, reporting, operator certification and renewal.
Distribution Operation & Maintenance
22% of exam · 2 questionsMains, valves, hydrants, storage, meters, flushing, main breaks, repairs, and cross-connection control.
Disinfection & Chlorine Residual
15% of exam · 1 questionsChlorine forms, breakpoint, residual monitoring, CT, disinfection byproducts, new main disinfection.
Hydraulics, Pumps & Pressure
15% of exam · 1 questionsPressure and head, friction loss, water hammer, pump types, curves, and controls.
Sampling & Water Quality
13% of exam · 1 questionsColiform sampling plans, lead and copper, chain of custody, taste and odor, nitrification, flushing for quality.
Safety
10% of exam · 1 questionsTrenching and shoring, confined space, traffic control, chlorine handling, lockout/tagout, PPE.
Distribution Math
10% of exam · 2 questionsVolume, flow, velocity, dosage, detention time, pressure conversions, disinfection and flushing calculations.
Math drills included
Pipe Volume
Find the gallons held in a length of main.
Tank Volume
Find the gallons in a cylindrical storage tank.
Chlorine Dosage
Pounds per day of chlorine needed for a dose and flow.
Detention Time
Time water spends in a pipe or tank.
Flow and Velocity
Convert between flow and velocity in a pipe.
Pressure and Head
Convert between psi and feet of head.
Sample questions
A taste of the bank — answers and explanations included.
Which federal law authorizes EPA to set drinking water standards for public water systems?
A community water system is defined as a public water system that serves at least how many year-round residents?
The main purpose of unidirectional flushing is to:
A cross-connection is:
Free chlorine residual consists of: