Welcome to the Water Treatment Operator Practice Test.
Choose the best possible answer to the question.
1.
What chemicals are used to substitute chlorine as pre-oxidants to minimize the formation of disinfection byproducts in a water plant?
2.
What should an authorized entrant do before he/she enters a permitted confined space?
3.
Why is it important to reduce turbidity?
4.
The proper emergency kit for a 150lb chlorine cylinder is?
5.
If there is gravel displacement in a filter bed from backwash rates with too high of a velocity, could eventually cause?
6.
The continuous circulation of water from the earth into the atmosphere and back again is called?
7.
In a conventional treatment plant, primary coagulant compounds added to water during the falsh-mix step are?
8.
During daylight hours, algae growth in a reservoir will do what?
9.
Settled backwash water that is recovered and re-used from a conventional surface water filtration plant should be returned to the beginning of the treatment train.
10.
What type of sedimentation basins have the flow of water admitted at an angle?
11.
The chlorine demand with vary with?
12.
What is the MCL for HAA5s?
13.
The hydrologic cycles create what two primary sources of water?
14.
How does Groundwater differ from Surface water sources?
15.
During filtration, what role does the action of straining of suspended particles play?
16.
What one of these would be the best chemical oxidant to use for controlling THMs formation potential?
17.
Which of the following are true. At the end of the coagulation, flocculation, and sedimentation process?
18.
What causes water to turn red?
19.
Solids contact basins have much shorter detention times than conventional treatment basins.
20.
What will accurately measure 500mL solution?
21.
If there is debris found in the filter bed after backwashing a filter this can indicate?
22.
What will cause reverse osmosis membranes to compact faster?
23.
What type of algae would most likely be found in nutrient rich water?
24.
What is the most effective disinfection residual?
25.
What does it mean if there are sand boils on the surfaces of rapid sand filters during backwash?
