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