Welcome to the Water Treatment Operator Practice Test.
Choose the best possible answer to the question.
1.
What does a high pH favor the formation of?
2.
What sludge dewatering process is best for alum sludges when the cakes are very dry, filtrate is clear, and solids capture is very high?
3.
What type of pump is most commonly used to feed chemicals into a water supply?
4.
An increase in filter media head loss could be an indicator of?
5.
What does it mean if there are sand boils on the surfaces of rapid sand filters during backwash?
6.
The minimum detention time in a conventional detention basin is?
7.
What conventional treatment step is eliminated by direct filtration?
8.
What chemical oxidant would be most effective for controlling biological growth?
9.
Determining the pH is an important water quality test because the results indicate?
11.
Lead contamination in drinking water may cause children to have altered physical and mental developments.
12.
HPC and Coliform tests are the same because they both?
13.
Current regulations require that water treatment wastes be monitored?
14.
What percentage of the air is usually converted to ozone if air is used to generate ozone?
15.
The fluoride injection point should be located after water has received complete treatment.
16.
If dry alum and quicklime are mixed together, what will happen?
17.
A composite sample should never be collected for what type of analysis?
19.
What is the best process for removing turbidity?
20.
According to the AWWA, at 0.1 NTUs filtration can remove what percent of giardia cyts?
21.
Records of chemical analyses should be kept for?
22.
What works best to disinfect cryptosporidium?
23.
The most favorable condition in raw water for good flocculation with alum is?
24.
Adding CO2 to water will?
25.
Low temperature water can be compensated for when using Alum by?
