Welcome to the Water Treatment Operator 50 Question Practice Test.
Choose the best possible answer to the question.
1.
Protozoa are larger than bacteria which are larger than viruses.
2.
Records of sanitary surveys must be kept for?
3.
What makes chlorine use more advantageous over chloramines?
4.
A pro of chloramines is?
5.
What is the rule that sets MCL's for harmful chemicals?
6.
Filter alum and polymer compounds are primarily
7.
What device collects the settled water as it leaves the sedimentation basin?
8.
It is important not to rinse out the sample bottes used for collecting samples for bacteriological examination because?
9.
One criteria to avoid filtration is that the fecal coliform concentration must be equal to or less than how many mg/L in representative samples of the source water immediately before the first or only point of disinfectant application in at least what percentage of the measurements made for the previous 6 months that the system served water to the public on an ongoing basis.
11.
Chlorine gas ton cylinders include two feed line connections. One is an upper and one is a lower that is designed to?
12.
Nitrification in the distribution system can best be described as?
13.
Under the process of safety management, sites are required to do a site assessment if the facility in a single process has more than how many pounds of chlorine?
14.
Improper backwashing of the filter media can lead to?
15.
The proper emergency kit for a chlorine tanker is?
16.
Why is turbidity in drinking water undesirable?
17.
What is the usual detention time required to produce optimal floc aggregation?
18.
If the continuous monitoring of the residual disinfectant concentration of the water entering the water system fails, how often will an operator need to collect a grab sample until the problem is fixed?
19.
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?
20.
Free chlorine residual values are based on contact time of at least?
21.
Which natural electrical force keeps colloidal particles apart in water treatment?
22.
What is true about heterotrophic bacteria?
23.
The Zeta Protentional measures the number of excess what found on the surface of all particular matter?
24.
The advantage of using oxidant ozone is that it?
25.
Coliform bacteria are classified as?
26.
A 50% solution of caustic soda will begin to crystallize if the temperature drops below?
27.
What will cause reverse osmosis membranes to compact faster?
28.
An autoclave will sterilize at
29.
At minimum, the Surface Water Treatment Rule requires surface water users to use what two treatment methods?
30.
What effect will an increase in total dissolved solids in water to be treated be?
31.
A connection between a potable water system and a non potable water system is?
32.
What is the process that is used to dewater sludge?
33.
The minimum detention time in a conventional detention basin is?
34.
What effect will caustic soda (NaOH)have on water?
35.
What do long filter runs tend to cause?
36.
What units ae the MCLs for radium-226, radium 228 and gross alpha particles radioactivity measured in?
37.
Assuming all other variables remain the same, a decrease in the pH when using free chlorine would?
38.
Where are samples taken for lead and copper?
39.
Gravity filters should not use more than what percent of daily production for backwash?
40.
What agency should be called for actual hands on assistance if a substantial chlorine leak incident occurs?
41.
Potassium Permanganate should be?
42.
The factors that effect coagulation and flocculation with alum are
43.
What is the most advantageous application point for powdered activated carbon?
44.
What are the chemical symbols for hypochlorous acid and hypochlorite ions?
45.
What is calcium sulfate also known as?
46.
What is a common mistake operators make in regards to flocculation is excessive flocculation time.
47.
When it is dissolved in water for disinfection purposes, how long does ozone last?
48.
What is the sample size for lead and copper analysis?
49.
What is the depression around the well of the water surface caused by pumping water from a well?
50.
The fusible metal plugs on chlorine containers are designed to melt at what temperatures?
