Welcome to the Water Treatment Operator 50 Question Practice Test.
Choose the best possible answer to the question.
1.
A common chemical added to boost alkalinity is?
2.
When it is dissolved in water for disinfection purposes, how long does ozone last?
3.
What oxidant has a potential of producing ClO3 by products?
4.
How does Groundwater differ from Surface water sources?
5.
The Zeta Protentional measures the number of excess what found on the surface of all particular matter?
6.
What is the best process for sequestering manganese?
7.
A sedimentation basin with mechanical sludge removal equipment should be drained and inspected?
8.
What is a common mistake operators make in regards to flocculation is excessive flocculation time.
9.
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?
10.
What sludge dewatering process is best for alum sludges when the cakes are very dry, filtrate is clear, and solids capture is very high?
11.
Determining the pH is an important water quality test because the results indicate?
12.
What chemical can be created by certain bacterial organisms and accelerate the corrosion process?
13.
What does the pulsating energy in a pulsator clarifier help to do?
14.
What chemical oxidant is most effective in reducing the concentration of taste and odor compounds caused by actinomycetes species?
15.
A 50% solution of caustic soda will begin to crystallize if the temperature drops below?
16.
Who can declare the vulnerability of a water source?
17.
What chemical can be added to the water system to sequester Iron and Manganese?
18.
The cl2 residual in water may be determined by using the reagent?
19.
Which process helps remove contaminants in water by causing them to cling to the surface of certain filter grains?
21.
What is the main function of a flocculation basin?
22.
Which of the following are true. At the end of the coagulation, flocculation, and sedimentation process?
23.
Where are samples taken for lead and copper?
24.
What range of temperatures will fusible plugs on chlorine cylinders melt?
25.
What part of the human body is the most vulnerable to allowing microorganisms to enter it?
26.
The Colilert test (ONPG-MUG) shows the presence of total coliforms is shown by?
27.
When pumping from Well #1 the static level of Well #2 drops. What causes this?
28.
Anionic polymers are used as filter aids to agglomerate small floc particles left in the sedimentation basin effluent and make them tougher to avoid?
29.
Which of the following composes the majority of scale in pipes?
30.
Lead contamination in drinking water may cause children to have altered physical and mental developments.
31.
Settled backwash water that is recovered and re-used from a conventional surface water filtration plant should be returned to the beginning of the treatment train.
32.
What is used to prevent water from entering a gas chlorinator?
33.
When filter run times between backwashes are long, like one week, because low turbidity water is being applied to the filters, what problem could still arise?
34.
What is the most advantageous application point for powdered activated carbon?
35.
What conventional treatment step is eliminated by direct filtration?
36.
Which forces will pull particles together once they have been destabilized in the coagulation-flocculation process?
37.
What is the most probable solution if crustaceans have clogged the water treatment plant's filters?
38.
Regulations require that wastes from water treatment be monitored?
39.
Powered activated carbon is usually used to control what?
40.
Waterborne diseases like typhoid and cholera are caused by?
41.
Where does most of the carbon dioxide in groundwater originate from?
42.
What should the an above ground raw water source be tested for if a water plant gets its water from a river that is subject to a cattle feed lot where water runs off?
43.
What sludge dewatering process requires a pre-coat of diatomaceous earth and its use has declined due to other newer methods?
44.
Sludge should be removed from a gravity sedimentation basin when reaching a level of?
45.
In a thermally stratified reservoir, water located beneath the thermocline may?
46.
What can immediately occur if newly installed manganese greensand was not skimmed of the fines after backwashing and stratification steps were completed?
47.
An autoclave will sterilize at
48.
Records of sanitary surveys must be kept for?
49.
The ion exchange process usually is used to remove what from water?
50.
Why do mud balls and hard spots develop in high rate gravity filters during the summer months?
