Welcome to the Water Treatment Operator Practice Test.
Choose the best possible answer to the question.
2.
Current regulations require that water treatment wastes be monitored?
3.
What process would be most effective for the destruction of heterotrophic bacteria?
4.
If ammonia vapor is passed over a chlorine leak from a cylinder valve, the leak is indicate by
5.
What is the most probable solution if nematodes are interfering with the disinfectant?
6.
Shellfish grown in polluted waters have been known to contain the organism that causes infectious hepatitis.
7.
Which is the normal sequence of solids removal processing following flash mixing in a conventional water treatment plant?
8.
Water impurities that come from plants or animals are
9.
What is used for detection of chlorine gas leaks?
10.
The Marble test is associated with?
11.
What unit process will diatoms most likely replace?
12.
Improper backwashing of the filter media can lead to?
13.
What type of filtration is permitted under the Surface Water Treatment Rule?
14.
Backwashing rate procedures should be reassessed to determine the cause of granular activated carbon loss if?
15.
The pH scale ranges from?
16.
What would have the least impact on the efficiency of copper sulfate?
17.
Reservoir turnover events cause by temperature changes reduce what at deeper water levels?
18.
What type of polar bonds are between the hydrogen atoms and the oxygen atom in water?
19.
Monthly sampling results must be reported by the water purveyor?
20.
Free chlorine residual values are based on contact time of at least?
21.
Why are check valves installed in suction lines?
22.
How often should the solids concentration be determined in solid contact basins with fairly constant water quality parameters?
23.
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?
24.
How often should the fluoride feed system be checked?
25.
The process by which water becomes a gas and rises is called?
