Welcome to the Water Treatment Operator 50 Question Practice Test.
Choose the best possible answer to the question.
1.
The maximum amount of time that between draining, cleaning, and inspection of sedimentation basins with mechanical sludge removal components is?
2.
The factors that effect coagulation and flocculation with alum are
3.
What is a major cause of short circuiting in a sedimentation basin?
4.
Records of sanitary surveys must be kept for?
5.
Gravity filters should not use more than what percent of daily production for backwash?
6.
What type of polymers are sometimes formulated with regulated substances?
7.
What angle should the parallel inclined plates be installed when using the shallow depth sedimentation method?
8.
The chlorine demand with vary with?
9.
A pro of chloramines is?
10.
What is dissolved air flotation good for removing?
11.
If the water temperature decreases this will cause the disinfection action of chlorine to?
12.
A composite sample should never be collected for what type of analysis?
13.
What should the turbidity of settled water be before it is applied to the filters, post sedimentation process?
14.
An artesian spring occurs when
15.
Filtration rates vary from what of filter surface area?
16.
What is the sticky mat and fine sand of suspended matter that forms on the surface of a sand filter?
17.
When responding to a chlorine gas leak, the responder should have a SCBA and a?
18.
If there is debris found in the filter bed after backwashing a filter this can indicate?
19.
What conditions will +Eh values of water support?
20.
Coagulation occurs during the first
21.
Which is classified as a secondary contaminant?
22.
Acid rain is caused by
23.
How often should the fluoride feed system be checked?
24.
Protozoa that must be removed from raw water are?
26.
What is the principle form of alkalinity found in raw water from both surface and ground sources?
27.
What range of temperatures will fusible plugs on chlorine cylinders melt?
28.
What water quality indicator is of greatest concern in a surface water treatment plant?
29.
When sludge is produced by water drawn from sources with relatively low turbidity it can be?
30.
For maximum charge neutralization the average zeta potential should be in what range?
31.
The hydrologic cycles create what two primary sources of water?
32.
Filter alum and polymer compounds are primarily
33.
What determines whether or not colloidal sized particles in suspension repel each other, stay in suspension, or agglomerate and eventually settle?
34.
What is used for detection of chlorine gas leaks?
35.
What device collects the settled water as it leaves the sedimentation basin?
36.
Wet activated carbon will remove what from the air? (In regards to safety)
37.
Reservoir turnover events cause by temperature changes reduce what at deeper water levels?
38.
Once they become fouled, how are reverse osmosis membranes cleaned?
39.
What is the pH of a saturated solution of sodium fluoride?
40.
A total coliform positive sample must be tested for the presence of?
41.
What unit process will diatoms most likely replace?
42.
Which of these has the most impact on tastes and odors in water?
43.
What is the main purpose for adding coagulant chemicals to raw water?
44.
What water rights are acquired from diverting a water source and then putting it to beneficial use?
45.
Post sedimentation process, the turbidity of settled water before it is applied to the filters should be kept below?
46.
If adequate surface area and detention time is provided in the sedimentation basin, what would the expected solids removal efficiency level be?
47.
The outlet of a forced ventilation system for a chlorinator room she be located?
48.
What gas can cause lung and skin irritation?
49.
Even a low concentration of ammonia gas can be fatal to humans if it is at least?
50.
What is the best addition for water that is highly colored due to organic matter?
