Operator drill: Disinfection

10 questions · Untimed · Every option explained

Chlorine forms and chemistry, breakpoint, CT, chloramines, UV and ozone, DBPs, chlorine safety and main and tank disinfection. Ten questions from our disinfection bank, with an explanation for every option.

Line drawing of a wall-mounted gas chlorinator with a rotameter and vacuum regulator on an upright chlorine cylinder chained to the wall, a breathing apparatus and a chlorine test colorimeter

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.