Class D Water Operator Practice Quiz 2026 – Questions, Answers & Detailed Rationales

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Class D Water Operator License Exam TCEQ NEWEST 2026 ACTUAL
EXAM TEST- COMPLETE REAL EXAM QUESTIONS AND CORRECT DETAILED
ANSWERS (VERIFIED ANSWERS) ALREADY GRADED A+ (MOST RECENT!!)


T/F: In Texas, about 75% of all water is used for commercial, industrial, or
agricultural purposes. - CORRECT ANSWER True


QUESTION : Water covers approximately ________ of Earth's surface. -
CORRECT ANSWER 71%


QUESTION : Drought is an extended period when a region receives a deficiency
in its ________ water supply. - CORRECT ANSWER atmospheric,
ground, or surface


QUESTION : T/F: Only about 1 gallon of tap water per person/day is used for
drinking and cooking - CORRECT ANSWER True


QUESTION : Excluding outside water use, the average household uses about
_______ gallons of water per month for inside use - CORRECT ANSWER
2,000


QUESTION : T/F: Only 3% of all the fresh water on earth can be easily accessed
for use. - CORRECT ANSWER False (only 1%)


QUESTION : T/F: In 1978, the Texas Department of Health (TDH) assumed
primacy over the Safe Drinking Water Act from the EPA. - CORRECT
ANSWER True


2026 2027 GRADED A+

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QUESTION : T/F: PWS officials should be pro-active in their approach to
terrorism. - CORRECT ANSWER True


QUESTION : _________ permits the owner of a well to pump as much water as
desired, even if the water is drained from beneath the land of others. -
CORRECT ANSWER Rule of Capture


QUESTION : In Texas, agricultural water demand accounts for about ___% of the
total water used. - CORRECT ANSWER 57%


QUESTION : T/F: An example of a non-transient non-community PWS is a rural
school. - CORRECT ANSWER True


QUESTION : Monitoring average and maximum daily water ______ enables us to
plan ahead for growth. - CORRECT ANSWER Demand


QUESTION : T/F: The Safe Drinking Water Act sets standards for drinking water
including physical, chemical, bacteriological, and radiological characteristics. -
CORRECT ANSWER True


QUESTION : "Potable" means water is safe to drink and has a measurable
chlorine ________. - CORRECT ANSWER Residual


QUESTION : The plant operator is responsible for a sufficient supply of safe and
________ drinking water. - CORRECT ANSWER Palatable



2026 2027 GRADED A+

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QUESTION : T/F: The Texas State Board of Fire Insurance requires utilities that
provide fire protection to have a minimum amount of water available based on
30 gals per person per day. - CORRECT ANSWER False (130 gals per
person per day)


QUESTION : T/F: The primary state regulator of water utilities is the TCEQ. -
CORRECT ANSWER True


QUESTION : T/F: All community and non-transient non-community PWS,
regardless of source of water, must be under the supervision of a licensed water
works operator. - CORRECT ANSWER True


QUESTION : Meter readers bring in operating revenue and profoundly impact
_____ relations. - CORRECT ANSWER Public


QUESTION : The federal regulator of drinking water is the _____. - CORRECT
ANSWER EPA


QUESTION : T/F: Duties of distribution operator include repairing leaks, making
taps, flushing mains, and taking radiological samples. - CORRECT
ANSWER False (Repair leaks, Make taps, Flush mains, Operate pumps, Take
*bacteriological* samples)


QUESTION : A service area has 1000 service connections. What can we estimate
the population of this service area to be? - CORRECT ANSWER 3,000
(multiply connections x 3)


2026 2027 GRADED A+