WATER LATEST
DISTRIBUTION 1
EXAM
Which method for controlling nitrification problems in a distribution
system would result in a temporary increase in trihalomethanes -
ANSWERS-super chlorinating reservoirs and storage tanks
Which is the available chlorine concentration used for disinfecting a
water storage tank using a method that involves spraying or painting all
of the interior tank surfaces? - ANSWERS-20 mg/L
When following a two step process for disinfecting a water storage tank,
the initial dosage of 50 mg/L available chlorine should be held in a
partially filled tank for - ANSWERS-at least six hours
Why are altitude valves used on water storage tanks? - ANSWERS-To
stop the flow of water into the tank when it is full
If iron bacteria are causing corrosion problems in the distribution
system, which is the most probable solution? - ANSWERS-Use a
corrosion chemical as treatment
END OF
PAGE
1
, WATER LATEST
DISTRIBUTION 1
EXAM
Which type of chlorine gas feeder is most commonly used? -
ANSWERS-Vacuum
When concentration cell corrosion occurs in iron pipes the electrons will
move through the - ANSWERS-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? - ANSWERS-
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
END OF
PAGE
2
, WATER LATEST
DISTRIBUTION 1
EXAM
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
END OF
PAGE
3
DISTRIBUTION 1
EXAM
Which method for controlling nitrification problems in a distribution
system would result in a temporary increase in trihalomethanes -
ANSWERS-super chlorinating reservoirs and storage tanks
Which is the available chlorine concentration used for disinfecting a
water storage tank using a method that involves spraying or painting all
of the interior tank surfaces? - ANSWERS-20 mg/L
When following a two step process for disinfecting a water storage tank,
the initial dosage of 50 mg/L available chlorine should be held in a
partially filled tank for - ANSWERS-at least six hours
Why are altitude valves used on water storage tanks? - ANSWERS-To
stop the flow of water into the tank when it is full
If iron bacteria are causing corrosion problems in the distribution
system, which is the most probable solution? - ANSWERS-Use a
corrosion chemical as treatment
END OF
PAGE
1
, WATER LATEST
DISTRIBUTION 1
EXAM
Which type of chlorine gas feeder is most commonly used? -
ANSWERS-Vacuum
When concentration cell corrosion occurs in iron pipes the electrons will
move through the - ANSWERS-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? - ANSWERS-
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
END OF
PAGE
2
, WATER LATEST
DISTRIBUTION 1
EXAM
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
END OF
PAGE
3
