CA Water Treatment Plant Operator Trivia Quiz
Reservoir Management and Intake Structures Water Treatment Plant Operation Volume 1 Sixth Edition Please let me know if there are any issues with the quiz such as typos, wrong answers, etc. .
- 1.Methods of managing lakes and reservoirs used for domestic water supplies very widely depending on local situations.
- A.
True
- B.
False
- 2.Algae remove carbon dioxide from solution and convert it into cellular material as they grow.
- A.
True
- B.
False
- 3.Respiration by algae results in an increase in carbon dioxide in water (lowering of pH), while photosynthesis results in a decrease in water (increasing of pH)
- A.
True
- B.
False
- 4.Fish kills from dead algae can be the result of the algae stimulating the gills of the fish.
- A.
True
- B.
False
- 5.Organics released using decomposition of flooded trees and brush may contribute to increased color, chlorine demand, and trihalomethane levels following chlorination.
- A.
True
- B.
False
- 6.Regulated general use of pesticides and herbicides can cause serious problems of contamination in domestic water supply reservoirs.
- A.
True
- B.
False
- 7.Storm water runoff from highways has the potential to cause adverse impacts on reservoir water quality.
- A.
True
- B.
False
- 8.Alkalinity of the water is the principal factor that increases the effectiveness of copper sulfate.
- A.
True
- B.
False
- 9.After an algal bloom occurs, it is very easy to control the bloom and correct the bad effects on water quality.
- A.
True
- B.
False
- 10.Careful evaluation of reservoir monitoring must be made to determine if algae die-offs actually occur as a result of chemical application or if they simply die off due to natural circumstances.
- A.
True
- B.
False
- 11.With complete destratification, surface waters are warmed and deeper waters are cooled until an equilibrium is reached and the temperatures are nearly equal from top to bottom.
- A.
True
- B.
False
- 12.Under freezing conditions, the heaveist (most dense) water is on the bottom and is warmer than surface water.
- A.
True
- B.
False
- 13.Records provide the basic foundation upon which management programs are designed, implemented, and evaluated.
- A.
True
- B.
False
- 14.Safety hazards involved in water quality sampling may be much less than those encountered within the laboratory.
- A.
True
- B.
False
- 15.To obtain good water quality from a water supply reservoir, it may be necessary to draw water from different levels during different seasons of the year.
- A.
True
- B.
False
- 16.Intake structures andrelated facilities should be inspected, operated, and tested periodically, preferably at regular intervals.
- A.
True
- B.
False
- 17.What is nutrient?
- A.
Any substance that is assimilated (taken in) by organisms and promotes growth
- B.
That portion of a body of fresh water extending from the shoreline lakeward to the limit of occupancy of rooted plants
- C.
The almost spontaneous mixing of all layers of water in a reservoir or lake
- D.
The minimum odor of a water sample that can just be detected after successive dilutions with odorless water
- 18.What is a littoral zone?
- A.
Any substance that is assimilated (taken in) by organisms and promotes growth
- B.
That portion of a body of fresh water extending from the shoreline lakeward to the limit of occupancy of rooted plants
- C.
The almost spontaneous mixing of all layers of water in a reservoir or lake
- D.
The minimum odor of a water sample that can just be detected after successive dilutions with odorless water
- 19.What are the most notable impacts on water supply reservoirs as a result of increases in organic loading caused by algal blooms?
- A.
Increased color in the water supply and a major increase in chlorine demand
- B.
Increase depth of the thermocline layer
- C.
Increased levels of iron and manganese
- D.
Increased pH in the water supply and an increase in dissolved oxygen
- 20.What causes high trihalomethane (THM) levels?
- A.
Chlorination in the absence of THM precursors
- B.
Chlorination of methane from anaerobic decomposition
- C.
Insufficient algae present in the water supply
- D.
Organic loading resulting from algal blooms and free residual chlorination
- 21.Why should dissolved oxygen depletion be controlled or eliminated within the metalimnion of water supply lakes and reservoirs
- A.
To eliminate or control algal blooms
- B.
To eliminate or control iron, manganese, and hydrogen sulfide problems
- C.
To eliminate or control nutrients
- D.
To eliminate or control pH fluctuations
- 22.What is the primary purpose of any watershed management program?
- A.
To collect and record changes or trends in water quality
- B.
To control, minimize, or eliminate any practice within the watershed area that are harmful to water quality
- C.
To enhance recreational benefits of the water supply lake or reservoir
- D.
To maintain or increase property values around the lake or reservoir
- 23.Why is copper sulfate effective as an algicide at low levels of alkalinity?
- A.
Because algae are more susceptible to algicides at low levels of alkalinity
- B.
Because copper ions react with bicarbonate and carbonate ions to form insoluble complexes that precipitate from solution
- C.
Because copper sulfate costs less at low levels of alkalinity
- D.
Because of the high levels of biologically active copper
- 24.Why must the operator have a reservoir monitoring program in reservoirs where algae are a potential problem?
- A.
To anticipate a possible algal bloom
- B.
To inform the local news media of the status of the algae
- C.
To issue boil water notices
- D.
To notify regulatory agencies of potential blooms
- 25.Which chemical is being considered as an alternative algicide to copper sulfate?
- A.
Ammonia-based herbicides
- B.
Ferric-based herbicides
- C.
Hydrogen-peroxide-based herbicides
- D.
Polyphosphate-based herbicides
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