Welcome to the Water Treatment Operator 50 Question Practice Test.
Choose the best possible answer to the question.
1.
What type of algae would most likely be found in nutrient rich water?
2.
The Zeta Protentional measures the number of excess what found on the surface of all particular matter?
4.
Regulations require that wastes from water treatment be monitored?
5.
A property that is important to water treatment that is physical as opposed to chemical is?
6.
Current regulations require that water treatment wastes be monitored?
7.
What is the best type of salt to use in the regeneration of ion exchange softener resin?
8.
A method of destabilization is reducing the zeta potential to allow floc formation. What would be an acceptable ZP range?
9.
What does it mean if there are sand boils on the surfaces of rapid sand filters during backwash?
10.
When sludge is produced by water drawn from sources with relatively low turbidity it can be?
11.
What is the main purpose for adding coagulant chemicals to raw water?
12.
What water rights are acquired from diverting a water source and then putting it to beneficial use?
13.
If a rapid gravity filter is well operated, the finished water will have?
14.
Why is water softening a part of the water treatment process?
15.
What is the definition of decant?
16.
The proper emergency kit for a chlorine tanker is?
17.
What is the usual range of percent sludge solids, if the sludge is allowed to accumulate and compact at the bottom of a sedimentation basin?
18.
What works best to disinfect cryptosporidium?
19.
Coagulation is a chemical and physical reaction that converts?
20.
When natural zeolites are used for softening and they have become exhausted from use, what chemical are they regenerated with?
21.
The proper emergency kit for a 150lb chlorine cylinder is?
22.
Daily flow rates are limited in a conventional treatment plant due to the detention time needed to settle the floc and its sedimentation basin. What is the time range for the clarifier?
23.
How many colonies per mI must the HPC test results show to be considered a reliable sample for coliform bacteria?
24.
What is the pH range of sodium hypochlorite?
25.
A constituent dissolved in source water that will precipitate when oxidized is?
26.
If the natural fluoride content of raw water is variable, the concentration of the raw water should be measured?
27.
What is the next test when the membrane filter test shows four green colored colonies after incubating for 24hrs?
28.
What is the filtration flow rate through a manganese greensand pressure filter at 10 degrees Celsius?
29.
When pumping from Well #1 the static level of Well #2 drops. What causes this?
31.
The loss of chloramine residuals in a water line or a storage tank is due to?
32.
If sodium hypochlorite comes into contact with the skin or eyes, the area should be flushed with water for at least 15 minutes.
33.
Determining the pH is an important water quality test because the results indicate?
34.
The release of dissolved gasses in saturated cold water when pressure decreases in filter beds causes?
35.
What is the main function of a flocculation basin?
36.
In a permit entry confined space, who is responsible for terminating entries?
37.
Every 1.0 mg/L of alum consumes what amount of alkalinity during the formation of floc particles?
38.
When soda ash is added to water for softening purposes what will it do?
39.
Which is classified as a secondary contaminant?
40.
What will ion exchange remove?
41.
A pro of chloramines is?
42.
The more hydrogen ions
43.
Where are samples taken for lead and copper?
44.
The chemical combination for substances in solution so as to cause separation in the insoluble form can be described as?
45.
Improper backwashing of the filter media can lead to?
46.
What is the sample size for lead and copper analysis?
47.
The water purveyor must post the Consumer Confidence Report on a publicly accessible web site if it serves more than how many people?
48.
A 50% solution of caustic soda will begin to crystallize if the temperature drops below?
49.
Why is it important to reduce turbidity?
50.
Powered activated carbon is usually used to control what?
