Welcome to the Water Treatment Operator 50 Question Practice Test.
Choose the best possible answer to the question.
1.
The treatment process that controls corrosion or scaling is known as?
2.
Which would be an indication that there is an issue with a part of the coagulation-flash mix-flocculation process operation?
3.
The loss of chloramine residuals in a water line or a storage tank is due to?
4.
Coliform bacteria are always?
5.
How often should the solids concentration be determined in solid contact basins with fairly constant water quality parameters?
6.
In gram staining, part of the coliform verification is?
7.
When the cell division in bacteria has been disrupted, it has been?
8.
What are total dissolved minerals in rainwater typically close to?
9.
What will neutralize chlorine?
10.
The most accurate chlorine residual measurement would be taken with?
11.
What is the best process for removing turbidity?
12.
What water quality indicator is of greatest concern in a surface water treatment plant?
13.
Permanganate reactions are highly dependent on?
14.
As CaCO3 how much alkalinity will dry-basis alum consume?
15.
What is the definition of decant?
16.
Granular activated carbon is used as?
17.
Test results from a multiple tube fermentation test for coliform bacteria are expressed as MPN (most probable number) per 100 milliliters, the number is determined from?
18.
What is calcium sulfate also known as?
19.
What precipitates can foul a cation exchange resin?
20.
Where does most of the carbon dioxide in groundwater originate from?
21.
If there is gravel displacement in a filter bed from backwash rates with too high of a velocity, could eventually cause?
22.
Low temperature water can be compensated for when using Alum by?
23.
Coliform bacteria are classified as?
24.
What chemical oxidant would be most effective for controlling biological growth?
25.
What process would be most effective for the destruction of heterotrophic bacteria?
26.
What is the best type of salt to use in the regeneration of ion exchange softener resin?
27.
What would have the least impact on the efficiency of copper sulfate?
28.
What zone in a lake or reservoir has weeds that grow underwater that may cause taste & odor complaints?
29.
Current regulations require that water treatment wastes be monitored?
30.
Why is water softening a part of the water treatment process?
31.
What are the four zones that divide a typical sedimentation basin?
32.
What form is Giardia most infectious?
33.
What type of self-contained breathing apparatus should be used at water plants?
34.
The chemical combination for substances in solution so as to cause separation in the insoluble form can be described as?
35.
Nitrification in the distribution system can best be described as?
36.
What is recarbonation?
37.
How is chlorine dioxide formed?
38.
Most regulated contaminants in drinking water?
39.
Impurities found in water that do not come from plants or animals are
40.
What is the sample size for lead and copper analysis?
41.
Recovered backwash water from a conventional surface water filtration plant may be returned to the headworks if allowed under?
42.
What conditions in a gravity filter will be produced when there is a larger particle size and less dense anthracite media?
43.
Why is turbidity in drinking water undesirable?
44.
What percentage of the earth's surface is covered in water?
45.
Which process helps remove contaminants in water by causing them to cling to the surface of certain filter grains?
46.
When abundant in water, what algae genera are most likely to cause taste and odor issues when abundant in water?
47.
Which of the following are true. At the end of the coagulation, flocculation, and sedimentation process?
48.
Where is the least desirable point in a plug flow sedimentation basin for turbulent flow that resuspends solids would be in the?
49.
HPC and Coliform tests are the same because they both?
50.
For alum coagulation of color, what is the correct pH?
