WASTEWATER OPERATOR CERTIFICATION COMPREHENSIVE EXAM 2026 QUESTIONS AND ANSWERS GUARANTEED TO PASS

WASTEWATER OPERATOR CERTIFICATION
COMPREHENSIVE EXAM 2026 QUESTIONS
AND ANSWERS GUARANTEED TO PASS


◉ Composite Sample. Answer: Sample prepared by combining grab
samples over 24-hour period


◉ Dissolved Oxygen (DO). Answer: Measure of oxygen dissolved in
water


◉ Effluent. Answer: Treated wastewater discharged from treatment plant
to environment


◉ Eutrophication. Answer: Excessive growth of plant and algae in
receiving waters due to dissolved nutrients


◉ Flume. Answer: Restriction in open channel used to measure flow


◉ Food to Microorganism Ratio (F:M or F/M). Answer: Amount of food
(BOD) provided to microorganisms

, ◉ Gallons per Day (gpd). Answer: Common wastewater flow
measurement expressed as number of gallons flowing each day


◉ Gallons per Hour (gph). Answer: Common wastewater flow
measurement expressed as number of gallons flowing each hour


◉ Gallons per Minute (gpm). Answer: Common wastewater flow
measurement expressed as number of gallons flowing each minute


◉ Grab Sample. Answer: Single sample taken at a particular time and
place


◉ Hydraulic Retention Time (HRT). Answer: Period of time that
wastewater remains in a tank


◉ Influent. Answer: Raw (untreated) wastewater entering a treatment
process


◉ Milligrams per Liter (mg/L). Answer: Concentration of a substance in
a liquid expressed as weight in milligrams per liter of volume


◉ Million Gallons per Day (MGD). Answer: Common wastewater flow
measurement expressed as millions of gallons of wastewater flowing
each day