1|Page
Texas Class C Water Operator 2025 Latest Exam
Prep Test Bank with 350 Questions and Answers /
Water Operator Class C TCEQ License Exam Latest
(Most Recent Qs)
1 PSI = ? FT - ...ANSWER...✓✓ 2.31 FT
Cathodic Protection - ...ANSWER...✓✓ Prevents Corrosion
What is C-Factor? - ...ANSWER...✓✓ Roughness of Inner
pipe (140+ Required)
Types of Water Main - ...ANSWER...✓✓ Grey Sand Cast,
Asbestos, Steel Pipe, Plastic, Ductile Iron, Concrete Pipe
Types of Water Service Lines - ...ANSWER...✓✓ Copper,
PVC
What is the standard service line size? - ...ANSWER...✓✓
1"
,2|Page
How far should a Water line be from a Sewer Line? -
...ANSWER...✓✓ 10' horizontal and 18" vertical unless in
water main quality casing
When is shoring needed? - ...ANSWER...✓✓ 5' deep or
more
What chemicals can you use to disinfect a water main? -
...ANSWER...✓✓ CL2 Gas or Liquid, NaOCL - Sodium
Hypochlorite, Ca(OCL)2 - Calcium Hypochlorite
What type of methods are there to disinfect a water main?
- ...ANSWER...✓✓ Slug Method, Continuous Feed, Tablet
Method
What is the accuracy of a water meter? - ...ANSWER...✓✓
98.5% - 101.5%
What is the standard water meter size? - ...ANSWER...✓✓
5/8'
What is Low flow? - ...ANSWER...✓✓ 1/4 gal
, 3|Page
What is Medium Flow? - ...ANSWER...✓✓ 1 gal
What is High Flow? - ...ANSWER...✓✓ 10 gal
Where is a compound meter found? - ...ANSWER...✓✓
Hotels, Schools, hospitals, anywhere with high flow usage
Where is a turbine water meter used? - ...ANSWER...✓✓
Irrigation Systems
Where is a proportional meter used? - ...ANSWER...✓✓
Fire System Meter
Types of Cross Connection Control - ...ANSWER...✓✓ Dual
Check Valve, Air Gap, Double Check Valve, Vacuum, or
RPZ
How do you calculate unaccounted for water? -
...ANSWER...✓✓ Water Treated - Water Used =
Unaccounted For
Unaccounted For / Water Treated = %
Texas Class C Water Operator 2025 Latest Exam
Prep Test Bank with 350 Questions and Answers /
Water Operator Class C TCEQ License Exam Latest
(Most Recent Qs)
1 PSI = ? FT - ...ANSWER...✓✓ 2.31 FT
Cathodic Protection - ...ANSWER...✓✓ Prevents Corrosion
What is C-Factor? - ...ANSWER...✓✓ Roughness of Inner
pipe (140+ Required)
Types of Water Main - ...ANSWER...✓✓ Grey Sand Cast,
Asbestos, Steel Pipe, Plastic, Ductile Iron, Concrete Pipe
Types of Water Service Lines - ...ANSWER...✓✓ Copper,
PVC
What is the standard service line size? - ...ANSWER...✓✓
1"
,2|Page
How far should a Water line be from a Sewer Line? -
...ANSWER...✓✓ 10' horizontal and 18" vertical unless in
water main quality casing
When is shoring needed? - ...ANSWER...✓✓ 5' deep or
more
What chemicals can you use to disinfect a water main? -
...ANSWER...✓✓ CL2 Gas or Liquid, NaOCL - Sodium
Hypochlorite, Ca(OCL)2 - Calcium Hypochlorite
What type of methods are there to disinfect a water main?
- ...ANSWER...✓✓ Slug Method, Continuous Feed, Tablet
Method
What is the accuracy of a water meter? - ...ANSWER...✓✓
98.5% - 101.5%
What is the standard water meter size? - ...ANSWER...✓✓
5/8'
What is Low flow? - ...ANSWER...✓✓ 1/4 gal
, 3|Page
What is Medium Flow? - ...ANSWER...✓✓ 1 gal
What is High Flow? - ...ANSWER...✓✓ 10 gal
Where is a compound meter found? - ...ANSWER...✓✓
Hotels, Schools, hospitals, anywhere with high flow usage
Where is a turbine water meter used? - ...ANSWER...✓✓
Irrigation Systems
Where is a proportional meter used? - ...ANSWER...✓✓
Fire System Meter
Types of Cross Connection Control - ...ANSWER...✓✓ Dual
Check Valve, Air Gap, Double Check Valve, Vacuum, or
RPZ
How do you calculate unaccounted for water? -
...ANSWER...✓✓ Water Treated - Water Used =
Unaccounted For
Unaccounted For / Water Treated = %
