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TCEQ CLASS C WATER LICENSE EXAM NEWEST
2026-2027 ACTUAL EXAM WITH COMPLETE
QUESTIONS AND ANSWERS, EXAMS OF NURSING
A public water supply system should maintain residual pressure of 20 psi and a minimum of
normal operating pressure of - - ANS✔️--35 psi
Before a new or repaired water line is placed into service, it must be properly disinfected by
providing a chlorine dosage of _________ and proper detention time - - ANS✔️--50 mg/L
Water bearing formations beneath the earths surface that are used as a source of water for public
water supplies are - - ANS✔️--Aquifers
The purpose of an air line on a well is - - ANS✔️--Determine Water leves in the well
The mesh size is an important feature of a well screen because properly sized openings should - -
ANS✔️--Reduce the amount of Sand pumped
When treating surface Water, the process of coagularon will be most affected by the - - ANS✔️--
pH, alkalinity, temperature, and chemical Dosage
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A rapid sand filter should be backwashed When - - ANS✔️--The loss of head gauge indicated
between 6 and 10 feet
Which of the following is an acceptable disinfection residual at the far reaches of the distribution
System - - ANS✔️--0.2 mg/L free chlorine residual, 0.8 mg/L chloramine residual when using
chloramine treatment, 0.5 mg/L chloramine for surface water supply, 0.5 mg/L free chlorine
residual for ground water Supply
What is the approximate total volume of a circular tank in gallons, if it is 30 feet in diameter, and
15 feet deep - - ANS✔️--79,300 gallons
You are using a chlorinator to provine a dosage of 4.0 mg/L. If the daily Water usage is 750,000
gallons, the gas chlorinator feed rate should be set at ____________ pounds per day. - - ANS✔️--
25
One gallon of water weighs - - ANS✔️--8.34 lbs.
One foot of water inside a storage vessel will raise a pressure gauge at the bottom of the vessel
by - - ANS✔️--0.433 lbs. (1 ft. Water creates 0.433 psi of pressure)
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A raw water intake structure may not be constructed with ___________ feet of a boat ramp,
dock, or marina - - ANS✔️--1,000 feet
Common types of pumps for use in water wells are - - ANS✔️--Vertical turbine and submersible
_________ is the natural exchange of water between the earth and air - - ANS✔️--The hydraulic
cycle
If and when a health hazard contamination event occurs in a public water System, the operator
must contact the state regulatory authority within __________ hours by telephone - - ANS✔️--24
hours
Potable water is that of - - ANS✔️--Maintained at adequate pressure, pathogen free, and contains
a chlorine residual
Excessive nitrates in drinking water can care a condition that affects infants under the age of 6
months, this condition known as - - ANS✔️--Blue baby
In surface water treatment the process of causing the fine particles in water to join together to
form larger heavier particles that settle in a clarifier is called - - ANS✔️--Coagulation
TCEQ CLASS C WATER LICENSE EXAM NEWEST
2026-2027 ACTUAL EXAM WITH COMPLETE
QUESTIONS AND ANSWERS, EXAMS OF NURSING
A public water supply system should maintain residual pressure of 20 psi and a minimum of
normal operating pressure of - - ANS✔️--35 psi
Before a new or repaired water line is placed into service, it must be properly disinfected by
providing a chlorine dosage of _________ and proper detention time - - ANS✔️--50 mg/L
Water bearing formations beneath the earths surface that are used as a source of water for public
water supplies are - - ANS✔️--Aquifers
The purpose of an air line on a well is - - ANS✔️--Determine Water leves in the well
The mesh size is an important feature of a well screen because properly sized openings should - -
ANS✔️--Reduce the amount of Sand pumped
When treating surface Water, the process of coagularon will be most affected by the - - ANS✔️--
pH, alkalinity, temperature, and chemical Dosage
,2|Page
A rapid sand filter should be backwashed When - - ANS✔️--The loss of head gauge indicated
between 6 and 10 feet
Which of the following is an acceptable disinfection residual at the far reaches of the distribution
System - - ANS✔️--0.2 mg/L free chlorine residual, 0.8 mg/L chloramine residual when using
chloramine treatment, 0.5 mg/L chloramine for surface water supply, 0.5 mg/L free chlorine
residual for ground water Supply
What is the approximate total volume of a circular tank in gallons, if it is 30 feet in diameter, and
15 feet deep - - ANS✔️--79,300 gallons
You are using a chlorinator to provine a dosage of 4.0 mg/L. If the daily Water usage is 750,000
gallons, the gas chlorinator feed rate should be set at ____________ pounds per day. - - ANS✔️--
25
One gallon of water weighs - - ANS✔️--8.34 lbs.
One foot of water inside a storage vessel will raise a pressure gauge at the bottom of the vessel
by - - ANS✔️--0.433 lbs. (1 ft. Water creates 0.433 psi of pressure)
, 3|Page
A raw water intake structure may not be constructed with ___________ feet of a boat ramp,
dock, or marina - - ANS✔️--1,000 feet
Common types of pumps for use in water wells are - - ANS✔️--Vertical turbine and submersible
_________ is the natural exchange of water between the earth and air - - ANS✔️--The hydraulic
cycle
If and when a health hazard contamination event occurs in a public water System, the operator
must contact the state regulatory authority within __________ hours by telephone - - ANS✔️--24
hours
Potable water is that of - - ANS✔️--Maintained at adequate pressure, pathogen free, and contains
a chlorine residual
Excessive nitrates in drinking water can care a condition that affects infants under the age of 6
months, this condition known as - - ANS✔️--Blue baby
In surface water treatment the process of causing the fine particles in water to join together to
form larger heavier particles that settle in a clarifier is called - - ANS✔️--Coagulation
