Welcome to the Water Treatment Operator 50 Question Practice Test.
Choose the best possible answer to the question.
1.
What are the chemical symbols for hypochlorous acid and hypochlorite ions?
2.
Salts, Bases, and Acids lacking carbon are organic compounds.
3.
When soda ash is added to water for softening purposes what will it do?
4.
Where are samples taken for lead and copper?
5.
What should be determined first before an in ground sedimentation tank is drained?
6.
What are the four zones that divide a typical sedimentation basin?
7.
What is the most probable solution if nematodes are interfering with the disinfectant?
8.
What is the most advantageous application point for powdered activated carbon?
9.
What is the rule that sets MCL's for harmful chemicals?
10.
What type of algae would most likely be found in nutrient rich water?
11.
A water sample that is acidified must have a final water pH of?
12.
What laboratory device sterilizes laboratory apparatuses and microbial media by using pressurized steam?
13.
Why are check valves installed in suction lines?
14.
What is the simplest chlorine gas feeder for controlling chlorine gas flow?
15.
What water rights are acquired from diverting a water source and then putting it to beneficial use?
16.
In a saturator tank for flows of less than 100 gpm, how thick should the layer be maintained of sodium fluoride crystals?
17.
What is the pH range of sodium hypochlorite?
18.
What type of chlorine gas feeding equipment would be most appropriate for distribution systems where re-chlorination is required?
19.
Under the process of safety management, sites are required to do a site assessment if the facility in a single process has more than how many pounds of chlorine?
20.
What two principles cause water hardness?
21.
What should an operator do to compensate for temperature changes in a conventional water treatment plant with dual media filters that has very cold water in the winter and warm water in the summer?
22.
What will ion exchange remove?
23.
What causes water to turn red?
24.
In gram staining, part of the coliform verification is?
25.
Wet activated carbon will remove what from the air? (In regards to safety)
26.
What is the best disinfectant against Cryptosporidium?
27.
Notification to the public of a Tier III violation is done
28.
Vegetation control in and around reservoirs is practiced to control the release of chemical compounds that
29.
Impurities that do not dissolve in water and settle out eventually are?
30.
A 50% solution of caustic soda will begin to crystallize if the temperature drops below?
31.
What is the process that is used to dewater sludge?
32.
What is the sample size for lead and copper analysis?
33.
What is the filtration flow rate through a manganese greensand pressure filter at 10 degrees Celsius?
34.
A change in the water elevation from the normal level to the pumping level is?
35.
When pumping from Well #1 the static level of Well #2 drops. What causes this?
36.
When abundant in water, what algae genera are most likely to cause taste and odor issues when abundant in water?
37.
A composite sample should never be collected for what type of analysis?
38.
If the continuous monitoring of the residual disinfectant concentration of the water entering the water system fails, how often will an operator need to collect a grab sample until the problem is fixed?
39.
An operator must strike a balance between TOC removal and the
40.
What is the most effective method for removing tastes and odors?
41.
What would be the short term goal when a water source is destroyed or damaged by some type of disaster that causes total contamination?
42.
What is a physical separation between a water supply outlet and the flood-level rim of a receiving vessel that must be at least twice the diameter of the water supply outlet and the flood-level rim of the receiving vessel. This separation must be at leasttwice the diameter of the water supply outlet and never less than one inch?
43.
What TON will consumers start to notice?
44.
Trihalomethanes (THM's) are primarily a concern in?
45.
What is the most important thing to consider in automatic startup after a power failure has occured?
46.
To unclog the head of a chemical feed pump an operator should first?
47.
Pulsator clarifiers are used to?
48.
What does the pulsating energy in a pulsator clarifier help to do?
49.
What are the precursors to THMs?
50.
What chemical oxidant would be best for controlling the forming of THMs?
