Welcome to the Water Treatment Operator 50 Question Practice Test.
Choose the best possible answer to the question.
1.
For alum coagulation of color, what is the correct pH?
2.
What is the most important thing to consider in automatic startup after a power failure has occured?
3.
What conditions in a gravity filter will be produced when there is a larger particle size and less dense anthracite media?
4.
Chlorine is chosen over chloramines because chlorine?
5.
Regulations require that wastes from water treatment be monitored?
6.
What type of self-contained breathing apparatus should be used at water plants?
7.
A connection between a potable water system and a non potable water system is?
8.
Low temperature water can be compensated for when using Alum by?
9.
Fine solids that remain suspended in water and will not settle on their own are known as?
10.
In the ion exchange softening process, once the resin can no longer soften water it must?
11.
Protozoa are larger than bacteria which are larger than viruses.
12.
In what form is Iron soluble in water?
13.
Sludge should be removed from a gravity sedimentation basin when reaching a level of?
14.
What forms when you add Alum to turbid water?
15.
What disinfectant is commonly used and free of Cl2 to avoid THMs?
16.
What does a high pH favor the formation of?
17.
What are the four zones that divide a typical sedimentation basin?
18.
What happens when there is high algae growth in a reservoir?
19.
In pounds, how much ammonia is contained in a 1 ton cylinder that is full?
20.
What was created to have uniform standards in Water Treatment?
21.
If a body of water has high salinity and is warm, it will generally be high in dissolved oxygen.
22.
Anionic polymers are used as filter aids to agglomerate small floc particles left in the sedimentation basin effluent and make them tougher to avoid?
23.
Alachlor, Lindane, and Toxaphene are examples of?
24.
Reservoir turnover events cause by temperature changes reduce what at deeper water levels?
25.
What is the only MCL that varies with the temperature?
26.
In which state are Giardia most vulnerable to inactivation through disinfection?
27.
What sludge dewatering process is best for alum sludges when the cakes are very dry, filtrate is clear, and solids capture is very high?
28.
Never apply water to a gaseous chlorine leak because the water will cause more issues.
29.
The organism that causes Giardiasis
30.
The maximum sustained flow possible from a well mostly depends on?
31.
What will ion exchange remove?
32.
What is the specific gravity standard for gases?
33.
The factors that effect coagulation and flocculation with alum are
34.
The continuous circulation of water from the earth into the atmosphere and back again is called?
35.
Adding CO2 to water will?
36.
Current regulations require that water treatment wastes be monitored?
37.
The release of dissolved gasses in saturated cold water when pressure decreases in filter beds causes?
38.
What device collects the settled water as it leaves the sedimentation basin?
39.
What type of charge do the compounds that form when iron or aluminum salts react with water have?
40.
What is the process that is used to concentrate sludge?
41.
The more hydroxide ions
42.
A pro of chloramines is?
43.
The upper surface of the zone of saturation of ground water in an unconfined aquifer is called the?
44.
The actions levels for lead and copper are?
45.
What will neutralize chlorine?
46.
The action level for copper is 0.015 mg/L.
47.
The most probable cause of a problem with a chlorinator is?
48.
When a raw water analysis shows the presence of anabaena, ceratium and oscillatoria, what problem may arise?
49.
What is an employee's average airborne exposure in any 8 hour shift in a 40 hour work week that should not be exceeded called?
50.
What water rights are acquired from diverting a water source and then putting it to beneficial use?
