2025/2026 Updated TCEQ Class C Water
Operator License Exam
Ammonia mixed with chlorine gas creates a - CORRECT ANSWER-white smoke
The most difficult part of a water distribution operator's job. - CORRECT ANSWERfurnish a continuous supply
Physical connection between a safe and potentially unsafe water source. - CORRECT
ANSWER-cross connection
A distribution system is a - CORRECT ANSWER-looped system
Dead end mains should be flushed - CORRECT ANSWER-every month
Excess nitrate causes a condition called - CORRECT ANSWER-blue baby syndrome
Water hardness is caused by - CORRECT ANSWER-calcium and magnesium
Sewer mains should be __ft away from water mains. - CORRECT ANSWER-9
Water with a pH less than 7 is considered to be - CORRECT ANSWER-acidic
Bacti records are kept for ____yrs and chemical records are kept for ___yrs. -
CORRECT ANSWER-5, 10
Bacti samples have to be returned to the lab within ___hrs of the collection time. -
CORRECT ANSWER-30
Color in the water supply should be less than _____ units. - CORRECT ANSWER-15
Chlorine is ______ times heavier than air. - CORRECT ANSWER-2.5
90% of underground pipe failures are related to improper - CORRECT ANSWERbackfill and bedding
The spoil bank should be located at least ___ft away from the ditch. - CORRECT
ANSWER-2