Welcome to the Water Treatment Operator 50 Question Practice Test.
Choose the best possible answer to the question.
1.
What is the natural attraction between particles that can be used to collect them into larger groups once destabilization has occurred?
2.
Opening the discharge valve one full turn on a chlorine cylinder will?
3.
The fluoride injection point should be located after water has received complete treatment.
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.
If a water system collects less than 40 samples a month, how many can be coliform positive and the water system still maintain compliance?
6.
What are different types of media used to filter water for human consumption?
7.
What will neutralize chlorine?
8.
The actions levels for lead and copper are?
9.
Why is it important to reduce turbidity?
10.
What are the four zones that divide a typical sedimentation basin?
11.
When using the lime soda ash process, it is impossible to produce water with a hardness of less than?
12.
Community water systems must check the natural radioactivity in their water supply at least?
13.
Manganese is rarely found in surface waters above a concentration of?
14.
In a conventional treatment plant, primary coagulant compounds added to water during the falsh-mix step are?
15.
What is used to prevent water from entering a gas chlorinator?
16.
If the chlorine demand suddenly increases from 0.4 mg/L to 2.8 mg/L, what could be the reason?
17.
What will accurately measure 500mL solution?
18.
Backwashing rate procedures should be reassessed to determine the cause of granular activated carbon loss if?
19.
What is the maximum feed rate when adding fluoride to drinking water?
20.
How much carbon is approximately lost during the reactivation process for granular activated carbon?
21.
What does a low pH favor the formation of?
22.
What is the specific gravity standard for gases?
23.
A composite sample should never be collected for what type of analysis?
24.
Microorganisms that require dissolved or free oxygen are?
25.
Evaporated water in the earth's atmosphere will condense to form
26.
Where is the least desirable point in a plug flow sedimentation basin for turbulent flow that resuspends solids would be in the?
27.
The upper surface of the zone of saturation of ground water in an unconfined aquifer is called the?
28.
What makes chlorine use more advantageous over chloramines?
29.
Once they become fouled, how are reverse osmosis membranes cleaned?
30.
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?
31.
If sodium hypochlorite comes into contact with the skin or eyes, the area should be flushed with water for at least 15 minutes.
32.
Why has magnetic ion exchange resin been developed?
33.
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?
34.
What form is the protozoan Giardia Lamblia transmitted in?
35.
When treating surface water, the main reason for removing solids is?
36.
A coliform sample is considered invalid and a new sample must be taken within 24hrs if the HPC count is above?
37.
The temperature range at which coliform bacteria samples must be stored before being delivered to a lab is?
38.
Water treatment chemicals are added based on?
39.
The disinfection treatment process is?
40.
What is a universal solvent?
41.
What could be the reason for reduced pump flow, deteriorating pump impellers, plugging Needle Valves, and clogging PRV and Surge Control Valves?
42.
Solids contact basins have much shorter detention times than conventional treatment basins.
43.
Why is water softening a part of the water treatment process?
44.
When a permit is required to enter a confined space, who may sign the permit?
45.
Under the Surface Water Treatment Rule a multiple barrier treatment consists of
46.
One of the ways an optimum coagulant dosage can be established is?
47.
In what form is Iron soluble in water?
48.
The organism that causes Giardiasis
49.
Recovered backwash water from a conventional surface water filtration plant may be returned to the headworks if allowed under?
50.
Fine solids that remain suspended in water and will not settle on their own are known as?
