UFRV - ANSWER Unit Filter Rate Volume
How can you remove truecolor? - ANSWER Coagulation & Chlorination
Synura - ANSWER Cucumber Smell
Normality - ANSWER Equivalents of solute per liter of solution
Asterionella Pandorina Uroglenopsis - ANSWER Fishy Smell
Anabaena Anacystis - ANSWER Musty Pig-Pen Smell
A centrifugal pump works correctly for a period of time but begins to lose suction. What is
the problem? - ANSWER Faulty Foot Valve
What is the effect of pH on chlorine disinfection? - ANSWER The best disinfection occurs
at lower pH. If you have high alkalinity and high pH (>8) consider longer chlorine contact
time due to reduced efficiency of they hypochlorite form.
Drawdown - ANSWER The lowering of the surface elevation of a body of water, the water
table, the piezometric surface, or the water surface of a well, as a result of the withdrawal or
water.
The process where Quicklime must be mixed with water. - ANSWER Slaking - Slaked lime
is calcium hydroxide. Ca(OH)₂
1
,Why is weir balance important? - ANSWER For uniform flow of water.
What do you do if floc is carring over? - ANSWER Adjust the alum dose.
What would happen if you added water to a chlorine leak? - ANSWER The leak would get
worse.
How do you open a high pressure valve? - ANSWER Very slowly
A measure of a solution's ability to dissolve or deposit calcium carbonate often used as an
indicator of the corrosivity of water the difference between actual pH(measured) and calcu-
lated pH. - ANSWER Langelier Saturation Index
What hardness is most difficult to remove? - ANSWER Magnesium Noncarbonated
What equipment is needed to feed chlorine dioxide? - ANSWER 1) Existing chlorination
system 2) Diaphragm pump 3) Solution Tank 4) Mixer 5) Chlorine dioxide generating tower 6)
Electrical controls
The taste and odor of the water is a problem. What could make it worse? - ANSWER Col-
ored water from algae
Where is the beveled edge on a V notch weir? - ANSWER On the downstream side of a
measuring weir
What does a Langlier Index of 3.0 indicate? - ANSWER Scale Forming
Very short period for chemical to be dispersed. - ANSWER Flashmix
2
, Accepted method of measuring turbidity - ANSWER Nephelometric
Selective destruction or inactivation of pathogenic organisms - ANSWER Disinfection
The weights that will react with, displace, or is equivalent to one gram of hydrogen - AN-
SWER Equivalent Weights
The appropriate place to store SCBA (Self-Contained Breathing Apparatus) - ANSWER
Outside the chlorine gas room
A vertical empty space between a drinking water supply and an unapproved water source
used to prevent cross-contamination. It should be twice the diameter of the pipe not to be
less than 1 inch. - ANSWER Air Gap
What are the components of a hypochlorite feed system? - ANSWER 1)Chemical solutioin
tank for hypochlorite 2)Diaphram pump 3)Power supply 4)Pressure switch 5)Water storage
tank
Floc moving in a faster current in a tank or basin? - ANSWER Short-Circuit
Crystalizes in cold weather aroung 50°F - ANSWER Caustic Soda (NaOH)
High head loss and the operator is washing filters but having short filter runs. Turbidy is high.
What is best corrective measure? - ANSWER Run Jar Test to determine the best coagulant
dosage
Measured by the amount of sulfuric acid required to lower the pH of water to a level of 4.5 -
ANSWER Alkalinity
3
How can you remove truecolor? - ANSWER Coagulation & Chlorination
Synura - ANSWER Cucumber Smell
Normality - ANSWER Equivalents of solute per liter of solution
Asterionella Pandorina Uroglenopsis - ANSWER Fishy Smell
Anabaena Anacystis - ANSWER Musty Pig-Pen Smell
A centrifugal pump works correctly for a period of time but begins to lose suction. What is
the problem? - ANSWER Faulty Foot Valve
What is the effect of pH on chlorine disinfection? - ANSWER The best disinfection occurs
at lower pH. If you have high alkalinity and high pH (>8) consider longer chlorine contact
time due to reduced efficiency of they hypochlorite form.
Drawdown - ANSWER The lowering of the surface elevation of a body of water, the water
table, the piezometric surface, or the water surface of a well, as a result of the withdrawal or
water.
The process where Quicklime must be mixed with water. - ANSWER Slaking - Slaked lime
is calcium hydroxide. Ca(OH)₂
1
,Why is weir balance important? - ANSWER For uniform flow of water.
What do you do if floc is carring over? - ANSWER Adjust the alum dose.
What would happen if you added water to a chlorine leak? - ANSWER The leak would get
worse.
How do you open a high pressure valve? - ANSWER Very slowly
A measure of a solution's ability to dissolve or deposit calcium carbonate often used as an
indicator of the corrosivity of water the difference between actual pH(measured) and calcu-
lated pH. - ANSWER Langelier Saturation Index
What hardness is most difficult to remove? - ANSWER Magnesium Noncarbonated
What equipment is needed to feed chlorine dioxide? - ANSWER 1) Existing chlorination
system 2) Diaphragm pump 3) Solution Tank 4) Mixer 5) Chlorine dioxide generating tower 6)
Electrical controls
The taste and odor of the water is a problem. What could make it worse? - ANSWER Col-
ored water from algae
Where is the beveled edge on a V notch weir? - ANSWER On the downstream side of a
measuring weir
What does a Langlier Index of 3.0 indicate? - ANSWER Scale Forming
Very short period for chemical to be dispersed. - ANSWER Flashmix
2
, Accepted method of measuring turbidity - ANSWER Nephelometric
Selective destruction or inactivation of pathogenic organisms - ANSWER Disinfection
The weights that will react with, displace, or is equivalent to one gram of hydrogen - AN-
SWER Equivalent Weights
The appropriate place to store SCBA (Self-Contained Breathing Apparatus) - ANSWER
Outside the chlorine gas room
A vertical empty space between a drinking water supply and an unapproved water source
used to prevent cross-contamination. It should be twice the diameter of the pipe not to be
less than 1 inch. - ANSWER Air Gap
What are the components of a hypochlorite feed system? - ANSWER 1)Chemical solutioin
tank for hypochlorite 2)Diaphram pump 3)Power supply 4)Pressure switch 5)Water storage
tank
Floc moving in a faster current in a tank or basin? - ANSWER Short-Circuit
Crystalizes in cold weather aroung 50°F - ANSWER Caustic Soda (NaOH)
High head loss and the operator is washing filters but having short filter runs. Turbidy is high.
What is best corrective measure? - ANSWER Run Jar Test to determine the best coagulant
dosage
Measured by the amount of sulfuric acid required to lower the pH of water to a level of 4.5 -
ANSWER Alkalinity
3
