TCEQ Class D Water mixed drill

10 questions · Untimed · Every option explained

Ten questions drawn from across the TCEQ Class D Water outline, at that exam’s level, with an explanation for every option.

Line drawing of a conventional water treatment train in cutaway: a rapid mix chamber, a flocculation basin with paddles, a sedimentation basin and a gravity filter with media layers over an underdrain

Before you start

Every question has four options and one best answer.
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.