LEVEL 1 WATER DISTRIBUTION STUDY EXAMS GUIDE
QUESTIONS AND ANSWERS SURE A+
✔✔If iron bacteria are causing corrosion problems in the distribution system, which is
the most probable solution? - ✔✔Use a corrosion chemical as treatment
✔✔Which type of chlorine gas feeder is most commonly used? - ✔✔Vacuum
✔✔When concentration cell corrosion occurs in iron pipes the electrons will move
through the - ✔✔iron pipe from the anode to the cathode
✔✔Which type of corrosion occurs when two types of dissimilar metals are electrically
connected and immersed in a common flow of water, where one metal becomes the
anode and the other the cathode? - ✔✔Galvanic corrosion
✔✔What chemical is used to dechlorinate water quality samples?
Sodium Thiosulfate
What Primary drinking water standard is established to minimize the risk of (blue baby)
NITRATE
What is the term for all the processes that convert liquid water into the gaseous form?
Evapotranspiration
Nutating disk p,d,
2 metals constitutee in water that we call hardness?
Calcium & Magnesium (Total Hardness)
What is the term for a water bearing layer of soil?
AQUIFIER
Another term for aquifier under pressure....
ARTESIAN
Term for the height to which the water will rise in a well tapped into an artesian aquifier?
PIEZIOMETRIC SURFACE
Vertical distance between static and pumping water level
DRAWDOWN
Diurnal mean.......
DAILY OR 24HOURS - ✔✔
, ✔✔What chemical is used to dechlorinate water quality samples? - ✔✔Sodium
Thiosulfate
✔✔What Primary drinking water standard is established to minimize the risk of (blue
baby) - ✔✔NITRATE
✔✔What is the term for all the processes that convert liquid water into the gaseous
form? - ✔✔Evapotranspiration
✔✔Most common P.D. meter used in service lines/multi family/apartments -
✔✔Compound Meters/Nutating disk
✔✔2 metals constitute in water that we call hardness? - ✔✔Calcium & Magnesium
(Total Hardness)
✔✔What is the term for a water bearing layer of soil? - ✔✔AQUIFIER
✔✔Another term for aquifier under pressure.... - ✔✔ARTESIAN
✔✔Term for the height to which the water will rise in a well tapped into an artesian
aquifier? - ✔✔PIEZIOMETRIC SURFACE
✔✔Vertical distance between static and pumping water level - ✔✔DRAWDOWN
✔✔Diurnal means....... - ✔✔DAILY OR 24HOURS
✔✔ Head is measured in - ✔✔height (feet) or pressure
✔✔Which type of valve will prevent the collapse of a pipe - ✔✔Air-and-vacuum relief
valve
✔✔The highest degree of protection of a coated steel pipe is.... - ✔✔cathodic protection
✔✔At which time of day is the age of the water stored in the distribution system the
highest/oldest? - ✔✔In the morning
✔✔One of chlorine advantages is that it - ✔✔has a persistent residual
✔✔Chlorine gas is _____ times heavier than air. - ✔✔2.5X
✔✔After a water storage tank has been chlorinated, which bacteriological test must
prove negative before the tank is put back into service. - ✔✔Coliform test
QUESTIONS AND ANSWERS SURE A+
✔✔If iron bacteria are causing corrosion problems in the distribution system, which is
the most probable solution? - ✔✔Use a corrosion chemical as treatment
✔✔Which type of chlorine gas feeder is most commonly used? - ✔✔Vacuum
✔✔When concentration cell corrosion occurs in iron pipes the electrons will move
through the - ✔✔iron pipe from the anode to the cathode
✔✔Which type of corrosion occurs when two types of dissimilar metals are electrically
connected and immersed in a common flow of water, where one metal becomes the
anode and the other the cathode? - ✔✔Galvanic corrosion
✔✔What chemical is used to dechlorinate water quality samples?
Sodium Thiosulfate
What Primary drinking water standard is established to minimize the risk of (blue baby)
NITRATE
What is the term for all the processes that convert liquid water into the gaseous form?
Evapotranspiration
Nutating disk p,d,
2 metals constitutee in water that we call hardness?
Calcium & Magnesium (Total Hardness)
What is the term for a water bearing layer of soil?
AQUIFIER
Another term for aquifier under pressure....
ARTESIAN
Term for the height to which the water will rise in a well tapped into an artesian aquifier?
PIEZIOMETRIC SURFACE
Vertical distance between static and pumping water level
DRAWDOWN
Diurnal mean.......
DAILY OR 24HOURS - ✔✔
, ✔✔What chemical is used to dechlorinate water quality samples? - ✔✔Sodium
Thiosulfate
✔✔What Primary drinking water standard is established to minimize the risk of (blue
baby) - ✔✔NITRATE
✔✔What is the term for all the processes that convert liquid water into the gaseous
form? - ✔✔Evapotranspiration
✔✔Most common P.D. meter used in service lines/multi family/apartments -
✔✔Compound Meters/Nutating disk
✔✔2 metals constitute in water that we call hardness? - ✔✔Calcium & Magnesium
(Total Hardness)
✔✔What is the term for a water bearing layer of soil? - ✔✔AQUIFIER
✔✔Another term for aquifier under pressure.... - ✔✔ARTESIAN
✔✔Term for the height to which the water will rise in a well tapped into an artesian
aquifier? - ✔✔PIEZIOMETRIC SURFACE
✔✔Vertical distance between static and pumping water level - ✔✔DRAWDOWN
✔✔Diurnal means....... - ✔✔DAILY OR 24HOURS
✔✔ Head is measured in - ✔✔height (feet) or pressure
✔✔Which type of valve will prevent the collapse of a pipe - ✔✔Air-and-vacuum relief
valve
✔✔The highest degree of protection of a coated steel pipe is.... - ✔✔cathodic protection
✔✔At which time of day is the age of the water stored in the distribution system the
highest/oldest? - ✔✔In the morning
✔✔One of chlorine advantages is that it - ✔✔has a persistent residual
✔✔Chlorine gas is _____ times heavier than air. - ✔✔2.5X
✔✔After a water storage tank has been chlorinated, which bacteriological test must
prove negative before the tank is put back into service. - ✔✔Coliform test
