Welcome to the Water Treatment Operator Practice Test.
Choose the best possible answer to the question.
1.
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?
2.
What can immediately occur if newly installed manganese greensand was not skimmed of the fines after backwashing and stratification steps were completed?
3.
Protozoa that must be removed from raw water are?
4.
As the level of phosphates increase in a new water supply, an operator should?
5.
By what factor does the hydrogen ion concentration change when the pH changes from 8.0 to 9.0?
6.
If the chlorine demand suddenly increases from 0.4 mg/L to 2.8 mg/L, what could be the reason?
7.
An autoclave will sterilize at
8.
What is used for detection of chlorine gas leaks?
9.
What is the only MCL that varies with the temperature?
10.
What is the best process for sequestering manganese?
11.
When pumping from Well #1 the static level of Well #2 drops. What causes this?
12.
The proper emergency kit for a TON chlorine cylinder is?
13.
Waterborne diseases like typhoid and cholera are caused by?
14.
Typically, how long is the flash mixing time in the coagulation process?
15.
What conventional treatment step is eliminated by direct filtration?
16.
What are the chemical symbols for hypochlorous acid and hypochlorite ions?
17.
What is the purpose of body feed in the operation of a diatomaceous earth filter?
18.
The more hydrogen ions
19.
Which of the following composes the majority of scale in pipes?
20.
Once they become fouled, how are reverse osmosis membranes cleaned?
21.
When treating surface water, the main reason for removing solids is?
22.
What adverse effects does the secondary contaminant manganese have?
23.
Direct filtration eliminates what conventional treatment step?
24.
The structure Diatomaceous Earth filters media is applied to is called?
25.
What is the main purpose for adding coagulant chemicals to raw water?
