Class C Water Operator License Exam With complete
solu on Rated A+ 2025/2026 NEW!!
Ammonia mixed with chlorine gas creates a - Ans white smoke
The most difficult part of a water distribu on operator's job. - Ans furnish a con nuous supply
Physical connec on between a safe and poten ally unsafe water source. - Ans cross connec on
A distribu on system is a - Ans looped system
Dead end mains should be flushed - Ans every month
Excess nitrate causes a condi on called - Ans blue baby syndrome
Water hardness is caused by - Ans calcium and magnesium
Sewer mains should be __( away from water mains. - Ans 9
Water with a pH less than 7 is considered to be - Ans acidic
Bac records are kept for ____yrs and chemical records are kept for ___yrs. - Ans 5, 10
Bac samples have to be returned to the lab within ___hrs of the collec on me. - Ans 30
, Color in the water supply should be less than _____ units. - Ans 15
Chlorine is ______ mes heavier than air. - Ans 2.5
90% of underground pipe failures are related to improper - Ans backfill and bedding
The spoil bank should be located at least ___( away from the ditch. - Ans 2
The following minimum residuals is ______mg/L for free chlorine and ____mg/L for total
chlorine. - Ans .2, .5
Public opinion of the water u lity is _______ at a stands ll. - Ans never
A bac sample should be taken every ____( of pipe. - Ans 1000
The most common collec on point for a bac sample is the water tap _______. - Ans outside
the house
A standpipe is considered ground storage unless it exceeds _____( above the highest
________. - Ans 80, service connec on
________ protec on is the electrochemical method for preven ng ________ of metal tanks. -
Ans cathodic, corrosion
The _____ is the only cross connec on control method approved by _______. - Ans air gap,
tceq
solu on Rated A+ 2025/2026 NEW!!
Ammonia mixed with chlorine gas creates a - Ans white smoke
The most difficult part of a water distribu on operator's job. - Ans furnish a con nuous supply
Physical connec on between a safe and poten ally unsafe water source. - Ans cross connec on
A distribu on system is a - Ans looped system
Dead end mains should be flushed - Ans every month
Excess nitrate causes a condi on called - Ans blue baby syndrome
Water hardness is caused by - Ans calcium and magnesium
Sewer mains should be __( away from water mains. - Ans 9
Water with a pH less than 7 is considered to be - Ans acidic
Bac records are kept for ____yrs and chemical records are kept for ___yrs. - Ans 5, 10
Bac samples have to be returned to the lab within ___hrs of the collec on me. - Ans 30
, Color in the water supply should be less than _____ units. - Ans 15
Chlorine is ______ mes heavier than air. - Ans 2.5
90% of underground pipe failures are related to improper - Ans backfill and bedding
The spoil bank should be located at least ___( away from the ditch. - Ans 2
The following minimum residuals is ______mg/L for free chlorine and ____mg/L for total
chlorine. - Ans .2, .5
Public opinion of the water u lity is _______ at a stands ll. - Ans never
A bac sample should be taken every ____( of pipe. - Ans 1000
The most common collec on point for a bac sample is the water tap _______. - Ans outside
the house
A standpipe is considered ground storage unless it exceeds _____( above the highest
________. - Ans 80, service connec on
________ protec on is the electrochemical method for preven ng ________ of metal tanks. -
Ans cathodic, corrosion
The _____ is the only cross connec on control method approved by _______. - Ans air gap,
tceq
