Texas Class C Water Operator License Exam Practice Test (Latest 2025/2026 Update) Questions with Verified Answers | 100% Correct.

Texas Class C Water Operator License
Exam Practice Test (Latest 2025/2026
Update) Questions with Verified
Answers | 100% Correct.

Question:
Water with a pH less than 7 is considered to be?
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Answer:
acidic




Question:

Bacti records are kept for ____yrs and chemical records are kept for ___yrs.?
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Answer:

5, 10
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Question:
Bacti samples have to be returned to the lab within ___hrs of the
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collection time.? i,-




Answer:
30

,Question:

Color in the water supply should be less than _____ units.?
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Answer:

15




Question:

Chlorine is ______ times heavier than air.?
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Answer:
2.5




Question:
90% of underground pipe failures are related to improper?
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Answer:
backfill and beddingi,- i,-




Question:

The spoil bank should be located at least ___ft away from the ditch.?
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Answer:

,2


Question:

Ammonia mixed with chlorine gas creates a?
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Answer:

white smoke i,-




Question:

The most difficult part of a water distribution operator's job.?
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Answer:
furnish a continuous supply
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Question:
Physical connection between a safe and potentially unsafe water source.?
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Answer:
cross connectioni,-




Question:

A distribution system is a?
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Answer:

, looped system i,-




Question:

Dead end mains should be flushed?
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Answer:

every month
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Question:
Excess nitrate causes a condition called?
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Answer:

blue baby syndrome
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Question:

Water hardness is caused by?
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Answer:

calcium and magnesium i,- i,-




Question:
Sewer mains should be __ft away from water mains.?
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