License Exam 2026 Exam
Questions and Correct
Answers | New Update
Ammonia mixed with chlorine gas creates a - ANSWER ✔✔white
smoke
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