Welcome to the Water Treatment Operator 50 Question Practice Test.
Choose the best possible answer to the question.
1.
A water sample that is acidified must have a final water pH of?
2.
If there is a notification of a HazMat spill of an unknown chemical into a stream that provides water to a water treatment plant, what would be the best action taken?
3.
The acronym BAT stands for
4.
Which of these has the most impact on tastes and odors in water?
5.
Regulations require that wastes from water treatment be monitored?
6.
Manganese is rarely found in surface waters above a concentration of?
7.
An organic particle that is stabilized by attracting a layer of water molecules to its surface is known as a?
8.
When abundant in water, what algae genera are most likely to cause taste and odor issues when abundant in water?
9.
What is the best type of salt to use in the regeneration of ion exchange softener resin?
10.
What is the term that defines the calculation of a water plants physical property due wear and tear?
11.
What is the best addition for water that is highly colored due to organic matter?
12.
At minimum, the Surface Water Treatment Rule requires surface water users to use what two treatment methods?
13.
How often should the solids concentration be determined in solid contact basins with fairly constant water quality parameters?
14.
A change in the water elevation from the normal level to the pumping level is?
15.
What oxidant has a potential of producing ClO3 by products?
16.
Which is the method for testing for total coliform bacteria?
17.
What water rights are acquired from diverting a water source and then putting it to beneficial use?
18.
What is the MCL for HAA5s?
19.
Shellfish grown in polluted waters have been known to contain the organism that causes infectious hepatitis.
20.
What forms when you add Alum to turbid water?
21.
The factors that effect coagulation and flocculation with alum are
22.
Reaching breakpoint chlorination means?
23.
When the cell division in bacteria has been disrupted, it has been?
24.
Every 1.0 mg/L of alum consumes what amount of alkalinity during the formation of floc particles?
25.
What does total alkalinity refer to?
26.
Filtration rates vary from what of filter surface area?
27.
What device collects the settled water as it leaves the sedimentation basin?
28.
The Colilert test (ONPG-MUG) shows the presence of total coliforms is shown by?
29.
Most regulated contaminants in drinking water?
30.
What two principles cause water hardness?
31.
What chemical oxidant would be most effective for controlling biological growth?
32.
What membrane process is used to treat brackish water or seawater?
33.
When disinfecting a well with free chlorine, what is the required exposure time and what must the concentration be?
34.
What gas can cause lung and skin irritation?
35.
What could happen if the sludge in a sedimentation basin becomes too thick?
36.
What national law regulates underground disposal of wastes in deep wells?
37.
Where is the least desirable point in a plug flow sedimentation basin for turbulent flow that resuspends solids would be in the?
38.
Potassium permanganate and manganese greensand are sometimes used to?
39.
For maximum charge neutralization the average zeta potential should be in what range?
40.
What are total dissolved minerals in rainwater typically close to?
41.
What is the depression around the well of the water surface caused by pumping water from a well?
42.
Coagulation occurs during the first
43.
The size of Giardia in the trophozoite stage is approximately?
45.
A system that fails to collect water samples in their distribution system would fall under which public notification system?
46.
What will ion exchange remove?
47.
What conventional treatment step is eliminated by direct filtration?
48.
What chemicals are used to substitute chlorine as pre-oxidants to minimize the formation of disinfection byproducts in a water plant?
49.
Dissolved-Air flotation is particularly good for?
50.
What is the maximum feed rate when adding fluoride to drinking water?
