Class C Water Operator License Exam
UPDATED ACTUAL Questions and
CORRECT Answers
Ammonia mixed with chlorine gas creates a - CORRECT ANSWER✔✔- white smoke
The most difficult part of a water distribution operator's job. - CORRECT ANSWER✔✔-
furnish 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 ANSWER✔✔-
backfill and bedding
The spoil bank should be located at least ___ft away from the ditch. - CORRECT
ANSWER✔✔- 2
The following minimum residuals is ______mg/L for free chlorine and ____mg/L for total
chlorine. - CORRECT ANSWER✔✔- .2, .5
Public opinion of the water utility is _______ at a standstill. - CORRECT ANSWER✔✔-
never
A bacti sample should be taken every ____ft of pipe. - CORRECT ANSWER✔✔- 1000
The most common collection point for a bacti sample is the water tap _______. - CORRECT
ANSWER✔✔- outside the house
A standpipe is considered ground storage unless it exceeds _____ft above the highest
________. - CORRECT ANSWER✔✔- 80, service connection
________ protection is the electrochemical method for preventing ________ of metal tanks. -
CORRECT ANSWER✔✔- cathodic, corrosion
The _____ is the only cross connection control method approved by _______. - CORRECT
ANSWER✔✔- air gap, tceq
UPDATED ACTUAL Questions and
CORRECT Answers
Ammonia mixed with chlorine gas creates a - CORRECT ANSWER✔✔- white smoke
The most difficult part of a water distribution operator's job. - CORRECT ANSWER✔✔-
furnish 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 ANSWER✔✔-
backfill and bedding
The spoil bank should be located at least ___ft away from the ditch. - CORRECT
ANSWER✔✔- 2
The following minimum residuals is ______mg/L for free chlorine and ____mg/L for total
chlorine. - CORRECT ANSWER✔✔- .2, .5
Public opinion of the water utility is _______ at a standstill. - CORRECT ANSWER✔✔-
never
A bacti sample should be taken every ____ft of pipe. - CORRECT ANSWER✔✔- 1000
The most common collection point for a bacti sample is the water tap _______. - CORRECT
ANSWER✔✔- outside the house
A standpipe is considered ground storage unless it exceeds _____ft above the highest
________. - CORRECT ANSWER✔✔- 80, service connection
________ protection is the electrochemical method for preventing ________ of metal tanks. -
CORRECT ANSWER✔✔- cathodic, corrosion
The _____ is the only cross connection control method approved by _______. - CORRECT
ANSWER✔✔- air gap, tceq
