Class C Water Operator License Exam
with verified answers already passed
Ammonia mixed with chlorine gas creates a white smoke - correct answer ✔✔white smoke
The most difficult part of a water distribution operator's job is furnish a continuous supply -
correct answer ✔✔furnish a continuous supply
Physical connection between a safe and potentially unsafe water source is a cross connection -
correct answer ✔✔cross connection
A distribution system is a looped system - correct answer ✔✔looped system
Dead end mains should be flushed every month - correct answer ✔✔every month
Excess nitrate causes a condition called blue baby syndrome - correct answer ✔✔blue baby
syndrome
Water hardness is caused by calcium and magnesium - correct answer ✔✔calcium and
magnesium
Sewer mains should be 9 ft away from water mains. - correct answer ✔✔9
Water with a pH less than 7 is considered to be acidic - correct answer ✔✔acidic
, Bacti records are kept for 5yrs and chemical records are kept for 10 yrs. - correct answer ✔✔5,
10
Bacti samples have to be returned to the lab within 30 hrs of the collection time. - correct
answer ✔✔30
Color in the water supply should be less than 15 units. - correct answer ✔✔15
Chlorine is 2.5 times heavier than air. - correct answer ✔✔2.5
90% of underground pipe failures are related to improper backfill and bedding - correct answer
✔✔backfill and bedding
The spoil bank should be located at least 2ft away from the ditch. - correct answer ✔✔2
The following minimum residuals is .2mg/L for free chlorine and .5mg/L for total chlorine. -
correct answer ✔✔.2, .5
Public opinion of the water utility is never at a standstill. - correct answer ✔✔never
A bacti sample should be taken every 1000ft of pipe. - correct answer ✔✔1000
The most common collection point for a bacti sample is the water tap outside the house. -
correct answer ✔✔outside the house
A standpipe is considered ground storage unless it exceeds 80ft above the highest service
connection. - correct answer ✔✔80, service connection
with verified answers already passed
Ammonia mixed with chlorine gas creates a white smoke - correct answer ✔✔white smoke
The most difficult part of a water distribution operator's job is furnish a continuous supply -
correct answer ✔✔furnish a continuous supply
Physical connection between a safe and potentially unsafe water source is a cross connection -
correct answer ✔✔cross connection
A distribution system is a looped system - correct answer ✔✔looped system
Dead end mains should be flushed every month - correct answer ✔✔every month
Excess nitrate causes a condition called blue baby syndrome - correct answer ✔✔blue baby
syndrome
Water hardness is caused by calcium and magnesium - correct answer ✔✔calcium and
magnesium
Sewer mains should be 9 ft away from water mains. - correct answer ✔✔9
Water with a pH less than 7 is considered to be acidic - correct answer ✔✔acidic
, Bacti records are kept for 5yrs and chemical records are kept for 10 yrs. - correct answer ✔✔5,
10
Bacti samples have to be returned to the lab within 30 hrs of the collection time. - correct
answer ✔✔30
Color in the water supply should be less than 15 units. - correct answer ✔✔15
Chlorine is 2.5 times heavier than air. - correct answer ✔✔2.5
90% of underground pipe failures are related to improper backfill and bedding - correct answer
✔✔backfill and bedding
The spoil bank should be located at least 2ft away from the ditch. - correct answer ✔✔2
The following minimum residuals is .2mg/L for free chlorine and .5mg/L for total chlorine. -
correct answer ✔✔.2, .5
Public opinion of the water utility is never at a standstill. - correct answer ✔✔never
A bacti sample should be taken every 1000ft of pipe. - correct answer ✔✔1000
The most common collection point for a bacti sample is the water tap outside the house. -
correct answer ✔✔outside the house
A standpipe is considered ground storage unless it exceeds 80ft above the highest service
connection. - correct answer ✔✔80, service connection
