Class C Water Operator License Exam Questions With
Complete Solutions
100, 150, 200 and 250 are approved classes of working pressure.
Correct Answers working pressure
2 Ft is the minimum setback distance for fire hydrants to avoid
large vehicle overhang? Correct Answers 2ft
5/8 meters need to be tested at least every 5 to 10 yrs. Correct
Answers 5, 10
75% of the earth's surface is ocean. Correct Answers 75
90% of underground pipe failures are related to improper
backfill and bedding Correct Answers backfill and bedding
97% of all the water on earth is saltwater. Correct Answers 97
A 5' deep pipe trench requires exit ladders every 25 feet and it
needs to have approved shoring. Correct Answers 25. shoring
A bacti sample should be taken every 1000ft of pipe. Correct
Answers 1000
A commonly used method to test for chlorine residual in water
is called the dpd method. Correct Answers dpd
A cross-connection is a connection between an approved and an
unapproved water supply. Correct Answers approved,
unapproved
, A distribution system is a looped system Correct Answers
looped system
A general deposit of mineral particles evenly along the inside of
the pipe is tuberculation. Correct Answers tuberculation
A mass of concrete placed at bends and valve structures to
prevent pipeline movement is commonly called a thrust block.
Correct Answers thrust block
A piston meter is a displacement meter. Correct Answers
displacement
A standpipe is considered ground storage unless it exceeds 80ft
above the highest service connection. Correct Answers 80,
service connection
A written sample writing plan is required for coliform
monitoring. Correct Answers coliform
According to the CDC, which mechanism or problem has caused
more waterborne disease outbreaks in the US than any other
reported factor? Correct Answers leaking backflows
All public water systems in Texas are required to use chlorine as
the final disinfectant. Correct Answers chlorine
Ammonia mixed with chlorine gas creates a white smoke
Correct Answers white smoke
Complete Solutions
100, 150, 200 and 250 are approved classes of working pressure.
Correct Answers working pressure
2 Ft is the minimum setback distance for fire hydrants to avoid
large vehicle overhang? Correct Answers 2ft
5/8 meters need to be tested at least every 5 to 10 yrs. Correct
Answers 5, 10
75% of the earth's surface is ocean. Correct Answers 75
90% of underground pipe failures are related to improper
backfill and bedding Correct Answers backfill and bedding
97% of all the water on earth is saltwater. Correct Answers 97
A 5' deep pipe trench requires exit ladders every 25 feet and it
needs to have approved shoring. Correct Answers 25. shoring
A bacti sample should be taken every 1000ft of pipe. Correct
Answers 1000
A commonly used method to test for chlorine residual in water
is called the dpd method. Correct Answers dpd
A cross-connection is a connection between an approved and an
unapproved water supply. Correct Answers approved,
unapproved
, A distribution system is a looped system Correct Answers
looped system
A general deposit of mineral particles evenly along the inside of
the pipe is tuberculation. Correct Answers tuberculation
A mass of concrete placed at bends and valve structures to
prevent pipeline movement is commonly called a thrust block.
Correct Answers thrust block
A piston meter is a displacement meter. Correct Answers
displacement
A standpipe is considered ground storage unless it exceeds 80ft
above the highest service connection. Correct Answers 80,
service connection
A written sample writing plan is required for coliform
monitoring. Correct Answers coliform
According to the CDC, which mechanism or problem has caused
more waterborne disease outbreaks in the US than any other
reported factor? Correct Answers leaking backflows
All public water systems in Texas are required to use chlorine as
the final disinfectant. Correct Answers chlorine
Ammonia mixed with chlorine gas creates a white smoke
Correct Answers white smoke
