Welcome to the Water Treatment Operator 50 Question Practice Test.
Choose the best possible answer to the question.
1.
The Marble test is associated with?
2.
Salts, Bases, and Acids lacking carbon are organic compounds.
3.
Waterborne diseases like typhoid and cholera are caused by?
4.
When must a water system collect annual samples if the water system has been determined to be reliable by the State and consistently below the MCL level for organic compounds?
5.
The treatment process that controls corrosion or scaling is known as?
6.
Which is the normal sequence of solids removal processing following flash mixing in a conventional water treatment plant?
7.
Regulations require that wastes from water treatment be monitored?
8.
A pump should always be insatlled?
9.
In a thermally stratified reservoir, water located beneath the thermocline may?
10.
What does total alkalinity refer to?
11.
During daylight hours, algae growth in a reservoir will do what?
12.
Where does most of the carbon dioxide in groundwater originate from?
14.
If the natural fluoride content of raw water is variable, the concentration of the raw water should be measured?
15.
If a water system collects less than 40 samples a month, how many can be coliform positive and the water system still maintain compliance?
16.
Why are check valves installed in suction lines?
17.
What unit process will diatoms most likely replace?
18.
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?
19.
Why do mud balls and hard spots develop in high rate gravity filters during the summer months?
20.
What is the usual detention time required to produce optimal floc aggregation?
21.
To unclog the head of a chemical feed pump an operator should first?
22.
Community water systems must check the natural radioactivity in their water supply at least?
23.
What is the best addition for water that is highly colored due to organic matter?
24.
Pure water can be found?
25.
What is the depression around the well of the water surface caused by pumping water from a well?
26.
What chemical oxidant is most effective in reducing the concentration of taste and odor compounds caused by actinomycetes species?
27.
Why is turbidity in drinking water undesirable?
28.
What is calcium sulfate also known as?
29.
What does it mean when a filter is ripening?
30.
What agency should be called for actual hands on assistance if a substantial chlorine leak incident occurs?
31.
What is the most favorable raw water condition for good flocculation?
32.
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?
33.
Monthly sampling results must be reported by the water purveyor?
34.
Turbidity in the drinking water system can not exceed?
35.
What is the minimum angle that self cleaning tube settlers must be placed?
36.
What is the optimal pH range for the removal of particulate matter when using Alum as a coagulant?
37.
Which is not considered to be a waterborne disease?
38.
Past the breakpoint chlorination point, what percentage of the total chlorine residual should be free chlorine?
39.
What will cause reverse osmosis membranes to compact faster?
40.
When using chloramines
41.
What would have the least impact on the efficiency of copper sulfate?
42.
If the chlorine demand suddenly increases from 0.4 mg/L to 2.8 mg/L, what could be the reason?
43.
When responding to a chlorine gas leak, the responder should have a SCBA and a?
44.
At minimum, the Surface Water Treatment Rule requires surface water users to use what two treatment methods?
45.
What causes an increase in taste and odors when natural waters lack DO?
46.
Vegetation control in and around reservoirs is practiced to control the release of chemical compounds that
47.
What is recarbonation?
48.
What percentage of the air is usually converted to ozone if air is used to generate ozone?
49.
What type of algae would most likely be found in nutrient rich water?
50.
HPC and Coliform tests are the same because they both?
