TCEQ CLASS C WATER LICENSE EXAM 2026
COMPREHENSIVE EXAM FULL QUESTIONS
AND VERIFIED SOLUTIONS GRADED A+
◉ The most difficult part of a water distribution operator's job.
Answer: furnish a continuous supply
◉ Physical connection between a safe and potentially unsafe water
source. Answer: cross connection
◉ A distribution system is a Answer: looped system
◉ Dead end mains should be flushed Answer: every month
◉ Excess nitrate causes a condition called Answer: blue baby
syndrome
◉ Water hardness is caused by Answer: calcium and magnesium
◉ Sewer mains should be __ft away from water mains. Answer: 9
◉ Water with a pH less than 7 is considered to be Answer: acidic
, ◉ Bacti records are kept for ____yrs and chemical records are kept
for ___yrs. Answer: 5, 10
◉ Bacti samples have to be returned to the lab within ___hrs of the
collection time. Answer: 30
◉ Color in the water supply should be less than _____ units. Answer:
15
◉ Chlorine is ______ times heavier than air. Answer: 2.5
◉ 90% of underground pipe failures are related to improper
Answer: backfill and bedding
◉ The spoil bank should be located at least ___ft away from the ditch.
Answer: 2
◉ The following minimum residuals is ______mg/L for free chlorine
and ____mg/L for total chlorine. Answer: .2, .5
◉ Public opinion of the water utility is _______ at a standstill. Answer:
never
COMPREHENSIVE EXAM FULL QUESTIONS
AND VERIFIED SOLUTIONS GRADED A+
◉ The most difficult part of a water distribution operator's job.
Answer: furnish a continuous supply
◉ Physical connection between a safe and potentially unsafe water
source. Answer: cross connection
◉ A distribution system is a Answer: looped system
◉ Dead end mains should be flushed Answer: every month
◉ Excess nitrate causes a condition called Answer: blue baby
syndrome
◉ Water hardness is caused by Answer: calcium and magnesium
◉ Sewer mains should be __ft away from water mains. Answer: 9
◉ Water with a pH less than 7 is considered to be Answer: acidic
, ◉ Bacti records are kept for ____yrs and chemical records are kept
for ___yrs. Answer: 5, 10
◉ Bacti samples have to be returned to the lab within ___hrs of the
collection time. Answer: 30
◉ Color in the water supply should be less than _____ units. Answer:
15
◉ Chlorine is ______ times heavier than air. Answer: 2.5
◉ 90% of underground pipe failures are related to improper
Answer: backfill and bedding
◉ The spoil bank should be located at least ___ft away from the ditch.
Answer: 2
◉ The following minimum residuals is ______mg/L for free chlorine
and ____mg/L for total chlorine. Answer: .2, .5
◉ Public opinion of the water utility is _______ at a standstill. Answer:
never
