This sheet lists the calculations most likely to appear on the Class 2 Water Treatment exam — CT values, chemical dosing, hydraulics, pump power, detention time, and process control — with worked examples showing correct unit handling and setup.
When a practice calculation goes wrong, use the formula sheet to check your setup before looking at the answer. Write the formula, plug in units, and sanity-check the result — the same three steps examiners reward with partial marks.
Practise Class 2 Water Treatment questions or take the mock exam.
Echelon Institute is an independent preparation provider. Always confirm which references are permitted in the actual exam with your certifying authority.