TCEQ Class C Water Operator License Exam | Most
Recent Exam 2026 | Actual Comprehensive
Real Exam Questions With 100% Correct
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A public water supply system should maintain residual pressure of 20 psi
and a minimum of normal operating pressure of
ANSWERS: 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
ANSWERS: 50 mg/L
Water bearing formations beneath the earths surface that are used as a
source of water for public water supplies are
ANSWERS: Aquifers
The purpose of an air line on a well is
ANSWERS: Determine Water leves in the well
,The mesh size is an important feature of a well screen because properly
sized openings should
ANSWERS: Reduce the amount of Sand pumped
When treating surface Water, the process of coagularon will be most
affected by the
ANSWERS: pH, alkalinity, temperature, and chemical Dosage
A rapid sand filter should be backwashed When
ANSWERS: 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
ANSWERS: 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
ANSWERS: 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.
ANSWERS: 25
One gallon of water weighs
ANSWERS: 8.34 lbs.
, One foot of water inside a storage vessel will raise a pressure gauge at
the bottom of the vessel by
ANSWERS: 0.433 lbs. (1 ft. Water creates 0.433 psi of pressure)
A raw water intake structure may not be constructed with _ feet of a boat
ramp, dock, or marina
ANSWERS: 1,000 feet
Common types of pumps for use in water wells are
ANSWERS: Vertical turbine and submersible
_ ____ is the natural exchange of water between the earth and air
ANSWERS: 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
ANSWERS: 24 hours
Recent Exam 2026 | Actual Comprehensive
Real Exam Questions With 100% Correct
Answers | Verified Answers | Already Graded
A+ | Guaranteed Success!!
A public water supply system should maintain residual pressure of 20 psi
and a minimum of normal operating pressure of
ANSWERS: 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
ANSWERS: 50 mg/L
Water bearing formations beneath the earths surface that are used as a
source of water for public water supplies are
ANSWERS: Aquifers
The purpose of an air line on a well is
ANSWERS: Determine Water leves in the well
,The mesh size is an important feature of a well screen because properly
sized openings should
ANSWERS: Reduce the amount of Sand pumped
When treating surface Water, the process of coagularon will be most
affected by the
ANSWERS: pH, alkalinity, temperature, and chemical Dosage
A rapid sand filter should be backwashed When
ANSWERS: 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
ANSWERS: 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
ANSWERS: 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.
ANSWERS: 25
One gallon of water weighs
ANSWERS: 8.34 lbs.
, One foot of water inside a storage vessel will raise a pressure gauge at
the bottom of the vessel by
ANSWERS: 0.433 lbs. (1 ft. Water creates 0.433 psi of pressure)
A raw water intake structure may not be constructed with _ feet of a boat
ramp, dock, or marina
ANSWERS: 1,000 feet
Common types of pumps for use in water wells are
ANSWERS: Vertical turbine and submersible
_ ____ is the natural exchange of water between the earth and air
ANSWERS: 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
ANSWERS: 24 hours
