Welcome to the Water Treatment Operator Practice Test.
Choose the best possible answer to the question.
1.
Why is it important to reduce turbidity?
2.
What precipitates can foul a cation exchange resin?
3.
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?
4.
What percentage of the air is usually converted to ozone if air is used to generate ozone?
5.
Impurities found in water that do not come from plants or animals are
6.
What sludge dewatering process requires a pre-coat of diatomaceous earth and its use has declined due to other newer methods?
7.
The most accurate chlorine residual measurement would be taken with?
8.
Ion exchange processes can typically be used for direct groundwater treatment as long as turbidity and what else have levels that are not excessive?
9.
What should be determined first before an in ground sedimentation tank is drained?
10.
What type of water violation requires an all clear notification be given to the public?
11.
What advantage over Aluminum Sulfate does Ferric Sulfate have?
12.
The release of dissolved gasses in saturated cold water when pressure decreases in filter beds causes?
13.
What is the removal level of cryptosporidium oocysts with conventional sedimentation?
14.
Solids contact basins have much shorter detention times than conventional treatment basins.
15.
When natural zeolites are used for softening and they have become exhausted from use, what chemical are they regenerated with?
16.
What is the best addition for water that is highly colored due to organic matter?
18.
What causes water to turn red?
19.
Assuming all other variables remain the same, a decrease in the pH when using free chlorine would?
20.
What will increase alkalinity, pH, and hardness?
21.
Where do Enteropathogenic organisms in water supplies originate?
22.
When entering a permitted confined space entry structure, always complete a permit and?
23.
The ion exchange process usually is used to remove what from water?
24.
When using chloramines
25.
Which process helps remove contaminants in water by causing them to cling to the surface of certain filter grains?
