WATER DISTRIBUTION OPERATOR PRACTICE EXAM 3
KEN TESH QUESTIONS AND CORRECT ANSWERS | GRADED
A+ | VERIFIED ANSWERS | BRAND NEW VERSION!
Which device measures the hydrogen ion activity in a solution? Correct
Answers PH Meter
What is the purpose of a shaft sleeve in a centrifugal pump? Correct
Answers Protects the sleeve from damage
What is a nutating disc Correct Answers Type of water meter for small
diameter domestic service
what will happen to a steel pipe if the water has low PH? Correct
Answers Corrode
___________________is a disinfection by product precursor Correct
Answers Natural organic matter
One of the requirements of 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) Correct
Answers Install corrosion control
If chlorine was added to water but there is no chlorine residual, which
statement is true? Correct Answers Chlorine demand has not been met
,Which of the following is a parasite and microbiological contaminant?
Correct Answers Giardia
What can be used to control scaling, but can never be used to control
corrosion? Correct Answers Sequestering
Most regulated contaminants in drinking water? Correct Answers Only
cause health effects after long term exposure
What is the only MCL that varies with the temperature? Correct
Answers Fluoride
According to the Surface Water Treatment Rule, water systems serving
a population of more than 500 persons must sample the filtered water for
turbidity every? Correct Answers Every Four Hours
The proper emergency kit for a TON chlorine cylinder is? Correct
Answers Kit B
The Surface Water Treatment Rule requires that disinfectant residuals be
collected at the same location in the distribution system as? Correct
Answers Samples tested for Coliforms
What is the minimum separation for an Air Gap? Correct Answers 1"
, The middle layer is a reservoir is? Correct Answers Metalimnion. Also
called the thermocline
Pollutants in water? Correct Answers Are a low hazard and effect water
aesthetics
Water mains that are 12" or less in diameter should have isolation valves
that are located not more than how many feet between each other?
Correct Answers 1,000'
All consumer water meters must test within what range of accuracy?
Correct Answers Within 1.5% Over or Under
Which of these is a displacement meter, which measure flow by
registering the number of times that the meter chamber is filled and
empty? Correct Answers Piston & Nutating Disc Meters
If a water main can not be installed at an adequate depth to prevent
freezing, Styrofoam insolation board can be used to protect the water in
the pipe from freezing. How far above the pipe does the Styrofoam
insulation need to be installed? Correct Answers 2-4"
The proper emergency kit for a 150lb chlorine cylinder is? Correct
Answers Kit A
The sensors that respond to liquid pressure will perform poorly if what
enters the sensor? Correct Answers Air
KEN TESH QUESTIONS AND CORRECT ANSWERS | GRADED
A+ | VERIFIED ANSWERS | BRAND NEW VERSION!
Which device measures the hydrogen ion activity in a solution? Correct
Answers PH Meter
What is the purpose of a shaft sleeve in a centrifugal pump? Correct
Answers Protects the sleeve from damage
What is a nutating disc Correct Answers Type of water meter for small
diameter domestic service
what will happen to a steel pipe if the water has low PH? Correct
Answers Corrode
___________________is a disinfection by product precursor Correct
Answers Natural organic matter
One of the requirements of 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) Correct
Answers Install corrosion control
If chlorine was added to water but there is no chlorine residual, which
statement is true? Correct Answers Chlorine demand has not been met
,Which of the following is a parasite and microbiological contaminant?
Correct Answers Giardia
What can be used to control scaling, but can never be used to control
corrosion? Correct Answers Sequestering
Most regulated contaminants in drinking water? Correct Answers Only
cause health effects after long term exposure
What is the only MCL that varies with the temperature? Correct
Answers Fluoride
According to the Surface Water Treatment Rule, water systems serving
a population of more than 500 persons must sample the filtered water for
turbidity every? Correct Answers Every Four Hours
The proper emergency kit for a TON chlorine cylinder is? Correct
Answers Kit B
The Surface Water Treatment Rule requires that disinfectant residuals be
collected at the same location in the distribution system as? Correct
Answers Samples tested for Coliforms
What is the minimum separation for an Air Gap? Correct Answers 1"
, The middle layer is a reservoir is? Correct Answers Metalimnion. Also
called the thermocline
Pollutants in water? Correct Answers Are a low hazard and effect water
aesthetics
Water mains that are 12" or less in diameter should have isolation valves
that are located not more than how many feet between each other?
Correct Answers 1,000'
All consumer water meters must test within what range of accuracy?
Correct Answers Within 1.5% Over or Under
Which of these is a displacement meter, which measure flow by
registering the number of times that the meter chamber is filled and
empty? Correct Answers Piston & Nutating Disc Meters
If a water main can not be installed at an adequate depth to prevent
freezing, Styrofoam insolation board can be used to protect the water in
the pipe from freezing. How far above the pipe does the Styrofoam
insulation need to be installed? Correct Answers 2-4"
The proper emergency kit for a 150lb chlorine cylinder is? Correct
Answers Kit A
The sensors that respond to liquid pressure will perform poorly if what
enters the sensor? Correct Answers Air
