Corrosion, Iron, Manganese and Fluoride Questions

The California treatment outline lists corrosion control, iron and manganese removal, taste and odor and fluoridation under Water Treatment Processes. Practice the chemistry operators adjust every day.

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100 questions in the official content counts, with a score for every area and an explanation for every option.

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  • 28 original corrosion and chemistry questions, every option explained
  • Tested on 9 of our 25 practice exams
Free sample · Question 1 of 3Corrosion and chemistry

What is powdered activated carbon (PAC) used for in water treatment?

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What our corrosion and chemistry questions cover

  • Corrosive water, stain colors, orthophosphate and the Langelier index
  • Iron and manganese: oxidation, greensand, permanganate and sequestering
  • Fluoridation chemicals, target levels, overfeed prevention
  • Taste and odor, powdered activated carbon and aeration
  • Softening, ion exchange, arsenic, nitrate and RO
Line drawing of an old pipe with rough corrosion bumps inside beside a clean pipe, a chemical feed tank with a metering pump, and a pH probe on a pipe

This list is our own summary, written for practice. The exam owners publish their outlines: California’s Expected Range of Knowledge, TCEQ’s Need-to-Know Criteria and WPI’s Need-to-Know Criteria.

Drill corrosion and chemistry, then sit a full practice exam

Take the California T2 practice exam

100 questions in the official content counts, with a score for every area and an explanation for every option.

Or try the free corrosion and chemistry drill

Ideas the questions test most

  1. Stains: copper blue-green, iron red-brown, manganese black.
  2. Fluoride: 0.7 mg/L recommended, 2.0 secondary, 4.0 MCL.
  3. Positive LSI scales; negative LSI corrodes.
  4. Interlock chemical feed pumps with the water pump they serve.

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Common questions

Why add orthophosphate?

It forms a protective film on pipe walls that reduces lead and copper release; pH and alkalinity adjustment are the other main corrosion control tools.

How do operators remove manganese?

Oxidize it (potassium permanganate works fast) and filter it, often through manganese dioxide-coated media such as greensand.

Take the California T2 practice exam

100 questions in the official content counts, with a score for every area and an explanation for every option.

Or try the free corrosion and chemistry drill

More operator topics

Outlines used for these questions: Expected Range of Knowledge, Drinking Water Treatment Exam (rev. 4/2020, PDF) · Expected Range of Knowledge, Drinking Water Distribution Exam (rev. 4/2020, PDF) · TCEQ: Need-to-Know Criteria for public water system operators · TCEQ: What applicants for wastewater licenses need to know · WPI: 2025 Need-to-Know Criteria.

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.