WATER DISTRIBUTION OPERATOR PRACTICE EXAMS 3 ACTUAL
QUESTIONS AND ANSWERS WITH COMPLETE SOLUTIONS VERIFIED
LATEST UPDATE 2026/2027
Terms in this set (100)
Which device measures the D. pH meter
hydrogen ion activity in a
solution?
A. Turbidimeter
B. Anode
C. Proportional meter
D. pH meter
What is the purpose of a C. Protects the sleeve from damage
shaft sleeve in a centrifugal
pump?
A. Cools and lubricates the
packings
,B. Provides a water seal a
C. Protects the sleeve from
damage
D. Connects the pump shaft
to the motor
What is a nutating-disc? D. Type of water meter for small-
A. An interior part of a diameter domestic service
centrifugal pump
B. A device to determine the
corrosiveness of water
C. A mixer for a storage tank
D. Type of water meter for
small-diameter domestic
service
What will happen to a steel B. Corrode
pipe if the water has low pH?
A. Scaling will occur
B. Corrode
,C. Hardness
D. Formation of calcium
carbonate
, __________is a disinfection by- C. Natural organic matter
product precursor.
A. Manganese
B. Iron
C. Natural organic matter
D. Calcium
One of the requirements of D. Install corrosion control
the Lead and Copper Rule is
for water systems to if
the action levels
for lead or copper are
exceeded (based on 90th
percentile of tap water
samples).
A. Take a repeat sample to
test for total coliform bacteria
B. Record manganese
concentration
QUESTIONS AND ANSWERS WITH COMPLETE SOLUTIONS VERIFIED
LATEST UPDATE 2026/2027
Terms in this set (100)
Which device measures the D. pH meter
hydrogen ion activity in a
solution?
A. Turbidimeter
B. Anode
C. Proportional meter
D. pH meter
What is the purpose of a C. Protects the sleeve from damage
shaft sleeve in a centrifugal
pump?
A. Cools and lubricates the
packings
,B. Provides a water seal a
C. Protects the sleeve from
damage
D. Connects the pump shaft
to the motor
What is a nutating-disc? D. Type of water meter for small-
A. An interior part of a diameter domestic service
centrifugal pump
B. A device to determine the
corrosiveness of water
C. A mixer for a storage tank
D. Type of water meter for
small-diameter domestic
service
What will happen to a steel B. Corrode
pipe if the water has low pH?
A. Scaling will occur
B. Corrode
,C. Hardness
D. Formation of calcium
carbonate
, __________is a disinfection by- C. Natural organic matter
product precursor.
A. Manganese
B. Iron
C. Natural organic matter
D. Calcium
One of the requirements of D. Install corrosion control
the Lead and Copper Rule is
for water systems to if
the action levels
for lead or copper are
exceeded (based on 90th
percentile of tap water
samples).
A. Take a repeat sample to
test for total coliform bacteria
B. Record manganese
concentration
