Welcome to the Water Treatment Operator 50 Question Practice Test.
Choose the best possible answer to the question.
1.
What is the best probable solution if rotifers are visible in finished water?
2.
What is an inorganic particle that is stabilized in water by attracting a layer of oppositely charged ions surrounded by a diffuse layer of counterions?
3.
The proper emergency kit for a 150lb chlorine cylinder is?
4.
What are the hair like appendages that Giardia trophozoites use to propel themselves through water are?
5.
In the MNO-MUG test the presence of E.coli is indicted by?
6.
Fine solids that remain suspended in water and will not settle on their own are known as?
7.
A public water system that can not meet the required removal of TOC can comply if the source water TOC level is what, calculated quarterly as a running annual average.
8.
The Surface Water Treatment Rule states that multibarrier treatment must result in the inactivation of Giardia cysts and viruses by?
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.
Bar screens are used to?
11.
When the temperature of raw surface water drops significantly the flocculator paddle speed should be?
12.
What process change be should be done if the level of turbidity in raw water decreased from 7 to 3 NTUs?
13.
Anaerobic conditions in reservoirs can cause what problem?
14.
What is the purpose of body feed in the operation of a diatomaceous earth filter?
15.
When responding to a chlorine gas leak, the responder should have a SCBA and a?
16.
Water hardness is measured in equivalent amounts of?
17.
A surface water treatment plant should have at least how many filtration beds?
18.
In a saturator tank for flows of less than 100 gpm, how thick should the layer be maintained of sodium fluoride crystals?
19.
What forms when you add Alum to turbid water?
20.
When should polyphosphates used for sequestration of iron and manganese from a well be injected?
21.
What could happen if the sludge in a sedimentation basin becomes too thick?
22.
What will cause reverse osmosis membranes to compact faster?
23.
For lime-soda ash softening plants, what is the most economical sludge disposal method?
24.
Post sedimentation process, the turbidity of settled water before it is applied to the filters should be kept below?
25.
Where do Enteropathogenic organisms in water supplies originate?
26.
Which of the following are true. At the end of the coagulation, flocculation, and sedimentation process?
27.
If a rapid gravity filter is well operated, the finished water will have?
28.
What determines whether or not colloidal sized particles in suspension repel each other, stay in suspension, or agglomerate and eventually settle?
29.
River water is not uniform in quality from hour to hour or day to day.
30.
Monthly sampling results must be reported by the water purveyor?
31.
A chlorine evaporator maintains a water bath at?
32.
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?
33.
The maximum amount of time that between draining, cleaning, and inspection of sedimentation basins with mechanical sludge removal components is?
34.
The most favorable condition in raw water for good flocculation with alum is?
35.
The chemical combination for substances in solution so as to cause separation in the insoluble form can be described as?
36.
What chemical oxidant would be most effective for controlling biological growth?
37.
What factor is used to express the relative volatility of a substance?
38.
Records of chemical analyses should be kept for?
39.
What device collects the settled water as it leaves the sedimentation basin?
40.
What is recarbonation?
41.
What is the cause of temporary hardness?
42.
What type of filtration is permitted under the Surface Water Treatment Rule?
43.
Giardia Lamblia is transmitted?
44.
What is the usual detention time required to produce optimal floc aggregation?
45.
Why is water softening a part of the water treatment process?
46.
What does not pose a threat to human health in the drinking water?
47.
A common chemical added to boost alkalinity is?
48.
Where are the two points on a gravity filter used to measure head loss located?
49.
What is the removal level of cryptosporidium oocysts with conventional sedimentation?
50.
What was created to have uniform standards in Water Treatment?
