Welcome to the Water Treatment Operator 100 Question Practice Test.
Choose the best possible answer to the question.
1.
What is the best process for sequestering manganese?
2.
The more hydrogen ions
3.
What is the motion called for the particles in water that are in constant motion and work in conjunction with the destabilization process to create floc?
4.
What are the hair like appendages that Giardia trophozoites use to propel themselves through water are?
5.
In a conventional treatment plant, primary coagulant compounds added to water during the falsh-mix step are?
6.
What organism is associated with taste and odors?
7.
What causes water to turn red?
8.
Giardia Lamblia is transmitted?
9.
What is the sticky mat and fine sand of suspended matter that forms on the surface of a sand filter?
10.
The injection of fluoride should be as far away as possible from any chemical containing?
11.
Viruses are sometimes resistant to disinfection.
12.
What conditions in a gravity filter will be produced when there is a larger particle size and less dense anthracite media?
13.
Anionic polymers are used as filter aids to agglomerate small floc particles left in the sedimentation basin effluent and make them tougher to avoid?
14.
The fusible metal plugs on chlorine containers are designed to melt at what temperatures?
15.
Protozoa are larger than bacteria which are larger than viruses.
16.
A water sample that is acidified must have a final water pH of?
17.
What is the quantity of dissolved oxygen in water a function of?
18.
What is the most probable solution if crustaceans have clogged the water treatment plant's filters?
19.
What type of filtration is permitted under the Surface Water Treatment Rule?
20.
Which of these has the most impact on tastes and odors in water?
21.
The hydrologic cycles create what two primary sources of water?
22.
What will cause reverse osmosis membranes to compact faster?
23.
Recovered backwash water from a conventional surface water filtration plant may be returned to the headworks if allowed under?
24.
Potassium Permanganate should be?
25.
What is the maximum feed rate when adding fluoride to drinking water?
26.
What is the depression around the well of the water surface caused by pumping water from a well?
27.
With coagulation reactions when alum is used, the specific insoluble floc formed is a precipitate of?
28.
The acronym BAT stands for
29.
What happens when there is high algae growth in a reservoir?
30.
When natural zeolites are used for softening and they have become exhausted from use, what chemical are they regenerated with?
31.
The Marble test is associated with?
32.
Where is sludge pumped when it is removed from a clarifier or after a filter backwash?
33.
In order to prevent air binding in a rapid sand filter, head loss should never exceed?
34.
Assuming all other variables remain the same, a decrease in the pH when using free chlorine would?
35.
As CaCO3 how much alkalinity will dry-basis alum consume?
36.
What is the sample size for lead and copper analysis?
37.
The process of the build up of corrosion products is known as?
38.
What oxidant has a potential of producing ClO3 by products?
39.
What would be the most probable solution to control algae in the source water if the algae is clogging the filters in the water plant?
40.
What is a universal solvent?
41.
Protozoa that must be removed from raw water are?
42.
Impurities found in water that do not come from plants or animals are
43.
Chlorine gas ton cylinders include two feed line connections. One is an upper and one is a lower that is designed to?
44.
If a water system collects at least 40 samples per month for total coliform analysis, no more than 20% of samples can come back positive.
45.
Monthly sampling results must be reported by the water purveyor?
46.
Never install a new gasket when a chlorine cylinder or container is changed.
47.
Granular activated carbon is used as?
48.
What should the an above ground raw water source be tested for if a water plant gets its water from a river that is subject to a cattle feed lot where water runs off?
49.
What is the rule that sets MCL's for harmful chemicals?
50.
What would be the short term goal when a water source is destroyed or damaged by some type of disaster that causes total contamination?
51.
What term describes the gathering of colloids into larger particles?
52.
Why is it important to reduce turbidity?
53.
What percentage of solids sludge is produced in the precipitative softening plant?
54.
The continuous circulation of water from the earth into the atmosphere and back again is called?
55.
In alum sludge, what is typically the percentage of solid material?
56.
Ion exchange processes can typically be used for direct groundwater treatment as long as turbidity and what else have levels that are not excessive?
57.
HPC and Coliform tests are the same because they both?
58.
The upper surface of the zone of saturation of ground water in an unconfined aquifer is called the?
59.
What is the pH range of sodium hypochlorite?
60.
Manganese is rarely found in surface waters above a concentration of?
61.
What does the pulsating energy in a pulsator clarifier help to do?
62.
What type of sedimentation basins have the flow of water admitted at an angle?
63.
When responding to a chlorine gas leak, the responder should have a SCBA and a?
64.
When treating surface water, the main reason for removing solids is?
65.
What chemical can be created by certain bacterial organisms and accelerate the corrosion process?
66.
What conventional treatment step is eliminated by direct filtration?
67.
Why are check valves installed in suction lines?
68.
The fluoride injection point should be located after water has received complete treatment.
69.
If adequate surface area and detention time is provided in the sedimentation basin, what would the expected solids removal efficiency level be?
70.
What does not pose a threat to human health in the drinking water?
71.
What is the most probable solution if nematodes are interfering with the disinfectant?
72.
What agency should be called for actual hands on assistance if a substantial chlorine leak incident occurs?
73.
Which oxidant has the protentional of producing Chlorate (Cl03) by-products?
74.
When using chloramines
75.
A connection between a potable water system and a non potable water system is?
76.
Coagulation occurs during the first
77.
The monitoring program that checks for Benzene (Leaking Underground Storage Tank) is checking for what kind of chemical contaminant?
78.
What is a major cause of short circuiting in a sedimentation basin?
79.
An organic particle that is stabilized by attracting a layer of water molecules to its surface is known as a?
80.
What is the process that is used to dewater sludge?
81.
A system that fails to collect water samples in their distribution system would fall under which public notification system?
82.
One of the ways an optimum coagulant dosage can be established is?
83.
What form is the protozoan Giardia Lamblia transmitted in?
84.
Why has magnetic ion exchange resin been developed?
85.
What is the most important thing to consider in automatic startup after a power failure has occured?
86.
What does the operator use to adjust the amount of liquid or gas delivered to water?
87.
According to the Surface Water Treatment Rule, multiple barrier treatment is defined as?
88.
What would have the least impact on the efficiency of copper sulfate?
89.
Nitrification in the distribution system can best be described as?
90.
Which natural electrical force keeps colloidal particles apart in water treatment?
91.
What is used to prevent water from entering a gas chlorinator?
92.
What should the flexible copper tubing be rated at the connects a 150lb chlorine cylinder to a manifold?
93.
Why is turbidity in drinking water undesirable?
94.
What is the process that is used to concentrate sludge?
95.
What parameter must be much better than conventional treatment basins in basins using tube and plate settlers?
96.
What is true about heterotrophic bacteria?
97.
Adding CO2 to water will?
98.
What test is used to determine the presence of coliform bacteria?
99.
Evaporated water in the earth's atmosphere will condense to form
100.
The maximum sustained flow possible from a well mostly depends on?
