Welcome to the Water Treatment Operator 50 Question Practice Test.
Choose the best possible answer to the question.
1.
Water hardness is measured in equivalent amounts of?
2.
What is the primary drawback for facilities that use ultra violet light to disinfect water?
3.
What type of filtration is permitted under the Surface Water Treatment Rule?
4.
During daylight hours, algae growth in a reservoir will do what?
5.
Which would be an indication that there is an issue with a part of the coagulation-flash mix-flocculation process operation?
6.
A 50% solution of caustic soda will begin to crystallize if the temperature drops below?
7.
A composite sample should never be collected for what type of analysis?
8.
What is the main function of a flocculation basin?
9.
The minimum detention time in a conventional detention basin is?
10.
What disinfectant is commonly used and free of Cl2 to avoid THMs?
11.
What water rights are acquired from diverting a water source and then putting it to beneficial use?
12.
The most probable cause of a problem with a chlorinator is?
13.
What are the chemical symbols for hypochlorous acid and hypochlorite ions?
15.
Low temperature water can be compensated for when using Alum by?
16.
Coagulation occurs during the first
17.
Salts, Bases, and Acids lacking carbon are organic compounds.
18.
Even a low concentration of ammonia gas can be fatal to humans if it is at least?
19.
What is the most effective method for removing tastes and odors?
20.
Most totalizer meters at treatment plants are commonly
21.
What chemical can be created by certain bacterial organisms and accelerate the corrosion process?
22.
In gram staining, part of the coliform verification is?
23.
What chemical oxidant is most effective in reducing the concentration of taste and odor compounds caused by actinomycetes species?
24.
Coliform bacteria are always?
25.
What is the MCL for THM's?
26.
What type of algae would most likely be found in nutrient rich water?
27.
Vegetation control in and around reservoirs is practiced to control the release of chemical compounds that
28.
The advantage of using oxidant ozone is that it?
29.
When entering a permitted confined space entry structure, always complete a permit and?
30.
Fine solids that remain suspended in water and will not settle on their own are known as?
31.
What is the typical strength of calcium hypochlorite?
32.
Why is it important to reduce turbidity?
33.
A chlorine evaporator maintains a water bath at?
34.
What is a similar process to reverse osmosis that uses lower pressures without removing all mineral content?
35.
What two principles cause water hardness?
36.
What chemical oxidant would be most effective for controlling biological growth?
37.
Which of the following illnesses is it hardest to kill the organism that causes the illness?
38.
At what temperature does the maximum density of water occur?
39.
Permanganate reactions are highly dependent on?
40.
What is the cause of temporary hardness?
41.
When soda ash is added to water for softening purposes what will it do?
42.
The Marble test is associated with?
43.
The acronym BAT stands for
44.
A method to increase or maintain the DO concentration of a thermally stratified reservoir?
45.
Which is a chemical used in water treatment as a coagulating chemical?
46.
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?
47.
What does a high pH favor the formation of?
48.
What do long filter runs tend to cause?
49.
Filter alum and polymer compounds are primarily
50.
What should an authorized entrant do before he/she enters a permitted confined space?
