Operator drill: Wastewater math

10 questions · Untimed · Every option explained

Loading, detention time, overflow and weir rates, F/M, SVI, MCRT, removal efficiency, chlorine dosing, sludge and pumping rates. Ten questions from our wastewater math bank, with an explanation for every option.

$Line drawing of a calculator, a blank conversion table, a tape measure, a horizontal tank with dimension arrows and a flow meter on a desk$

Before you start

Most questions have four options and one best answer; true/false questions have two.
Check each answer to see why every option is right or wrong before moving on. Checked answers cannot be changed.

Game Assessment Prep is an independent practice site, not affiliated with or endorsed by Water Professionals International (WPI, formerly ABC), the California State Water Resources Control Board or the Texas Commission on Environmental Quality. Every question is original; none is taken from a certification exam, an official study guide or another prep provider.