Welcome to the Water Treatment Operator Practice Test.
Choose the best possible answer to the question.
1.
The fluoride injection point should be located after water has received complete treatment.
2.
Under the process of safety management, sites are required to do a site assessment if the facility in a single process has more than how many pounds of chlorine?
3.
What device found in labs sterilizes by using pressurized steam?
4.
Microorganisms that require dissolved or free oxygen are?
5.
What would be the short term goal when a water source is destroyed or damaged by some type of disaster that causes total contamination?
6.
Never install a new gasket when a chlorine cylinder or container is changed.
7.
Typically, how long is the flash mixing time in the coagulation process?
8.
What does it mean if there are sand boils on the surfaces of rapid sand filters during backwash?
9.
The pH scale ranges from?
10.
If the water temperature decreases this will cause the disinfection action of chlorine to?
11.
How does Groundwater differ from Surface water sources?
12.
The Zeta Protentional measures the number of excess what found on the surface of all particular matter?
13.
What is the quantity of dissolved oxygen in water a function of?
14.
Determining the pH is an important water quality test because the results indicate?
15.
What factor is used to express the relative volatility of a substance?
16.
At minimum, the Surface Water Treatment Rule requires surface water users to use what two treatment methods?
17.
What can be done to prevent discharge cavitation from occurring?
18.
How much does water expand by when it freezes compared to its original value?
19.
According to the AWWA, the time period a filter should be used and then replaced is?
20.
How often should the solids concentration be determined in solid contact basins with fairly constant water quality parameters?
21.
Ozone contractors must have a system to collect ozone off-gas because?
22.
Nitrification in the distribution system can best be described as?
23.
Why are check valves installed in suction lines?
24.
What gasket is the best to use when connecting a chlorine cylinder or container to the chlorine feed system?
25.
What angle should the parallel inclined plates be installed when using the shallow depth sedimentation method?
