Welcome to the Water Treatment Operator 50 Question Practice Test.
Choose the best possible answer to the question.
1.
What is dental fluorosis?
2.
Never install a new gasket when a chlorine cylinder or container is changed.
3.
What is recarbonation?
4.
Wet activated carbon will remove what from the air? (In regards to safety)
5.
What is the best process for removing turbidity?
6.
A grout seal should be?
7.
One ton chlorine containers are equipped with two valves, one for liquid and one for gas.
8.
Water hardness is measured in equivalent amounts of?
9.
An increase in filter media head loss could be an indicator of?
10.
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?
11.
The advantage of using oxidant ozone is that it?
12.
By what factor does the hydrogen ion concentration change when the pH changes from 8.0 to 9.0?
13.
Which is classified as a secondary contaminant?
14.
Fluoride concentration above what mg/L will likely cause teeth to become pitted?
15.
What are different types of media used to filter water for human consumption?
16.
Trihalomethanes (THM's) are primarily a concern in?
17.
What emergency kit is for chlorine tank cars?
18.
A sedimentation basin with mechanical sludge removal equipment should be drained and inspected?
19.
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?
20.
What is the removal level of cryptosporidium oocysts with conventional sedimentation?
21.
What device collects the settled water as it leaves the sedimentation basin?
22.
When treating surface water, the main reason for removing solids is?
23.
What is the most probable solution if crustaceans have clogged the water treatment plant's filters?
24.
As the level of phosphates increase in a new water supply, an operator should?
25.
Alachlor, Lindane, and Toxaphene are examples of?
26.
When using the lime soda ash process, it is impossible to produce water with a hardness of less than?
27.
Which of these has the most impact on tastes and odors in water?
28.
The chemical combination for substances in solution so as to cause separation in the insoluble form can be described as?
29.
What adverse effects does the secondary contaminant manganese have?
30.
What conditions will +Eh values of water support?
31.
If there is a notification of a HazMat spill of an unknown chemical into a stream that provides water to a water treatment plant, what would be the best action taken?
32.
The type of filter that provides the lowest flow per square foot of surface are is?
33.
A surface water treatment plant should have at least how many filtration beds?
34.
If there is gravel displacement in a filter bed from backwash rates with too high of a velocity, could eventually cause?
36.
A connection between a potable water system and a non potable water system is?
37.
Waterborne diseases like typhoid and cholera are caused by?
38.
What is the most efficient process for the removal of nitrate and nitrate?
39.
Chlorine gas ton cylinders include two feed line connections. One is an upper and one is a lower that is designed to?
40.
Why are polyphosphates used in drinking water?
41.
What does it mean when a filter is ripening?
42.
What is the next test when the membrane filter test shows four green colored colonies after incubating for 24hrs?
43.
Which oxidant has the protentional of producing Chlorate (Cl03) by-products?
44.
What parameter must be much better than conventional treatment basins in basins using tube and plate settlers?
45.
What are the four zones that divide a typical sedimentation basin?
46.
What will cause reverse osmosis membranes to compact faster?
47.
What membrane process is used to treat brackish water or seawater?
48.
Nitrification in the distribution system can best be described as?
49.
A composite sample should never be collected for what type of analysis?
50.
Never apply water to a gaseous chlorine leak because the water will cause more issues.
