Welcome to the Water Treatment Operator Practice Test.
Choose the best possible answer to the question.
1.
When disinfecting a well with free chlorine, what is the required exposure time and what must the concentration be?
2.
What test is used to estimate the optimum dosage of chemical compounds used for some process in water treatment?
3.
What are total dissolved minerals in rainwater typically close to?
4.
What is put in place in a reservoir to create an even flow rate through the entire volume of a clearwell to provide a consistent amount of detention time and minimize short-circuiting?
5.
What is usually used to disinfect the gravel packing of a ground water well?
6.
Evaporated water in the earth's atmosphere will condense to form
7.
What was created to have uniform standards in Water Treatment?
8.
Waterborne diseases like typhoid and cholera are caused by?
9.
Which of these has the most impact on tastes and odors in water?
10.
If a body of water has high salinity and is warm, it will generally be high in dissolved oxygen.
11.
Impurities found in water that do not come from plants or animals are
12.
When sludge is produced by water drawn from sources with relatively low turbidity it can be?
13.
What is the pH of a saturated solution of sodium fluoride?
14.
If sodium hypochlorite comes into contact with the skin or eyes, the area should be flushed with water for at least 15 minutes.
15.
The chlorine demand with vary with?
16.
What advantage over Aluminum Sulfate does Ferric Sulfate have?
17.
A method of destabilization is reducing the zeta potential to allow floc formation. What would be an acceptable ZP range?
18.
What will occur if the activation process of silica is not carefully controlled?
19.
Which is the method for testing for total coliform bacteria?
20.
The porous material just above the water table that holds small quantities of water by capillary action is called?
21.
The chemical combination for substances in solution so as to cause separation in the insoluble form can be described as?
22.
The most probable cause of a problem with a chlorinator is?
23.
What unit process will diatoms most likely replace?
24.
What percentage of solids sludge is produced in the precipitative softening plant?
25.
Monthly sampling results must be reported by the water purveyor?
