Water Treatment Plant Operation Volume 2 Chapter 15
.
- 1.A methane is involved in the THM reaction
- A.
True
- B.
False
- 2.THM Samples should be sent to the laboratory immediately after they are collected
- A.
True
- B.
False
- 3.And understanding of the chemistry of THM formation is crucial if a water solution is to solve the THM problem
- A.
True
- B.
False
- 4.The higher the concentrations of free chlorine and natural organics and the water, the more THMs will be produced
- A.
True
- B.
False
- 5.Aeration is not effective in removing the more volatile chemicals
- A.
True
- B.
False
- 6.Chloromines are weaker disinfectants them free chlorine, but the residuals remain much longer than free chlorine
- A.
True
- B.
False
- 7.Ingestion of very high levels of arsenic can cause acute (short term) adverse health effects
- A.
True
- B.
False
- 8.The PH of the water is important in determining the arsenic speciation (arsenic (three) or arsenic (V) form )
- A.
True
- B.
False
- 9.Before a blending operation can be implemented, theoretical calculations must be made to determine if blending is feasible and will be an effective solution
- A.
True
- B.
False
- 10.The activated alumina adsorption process for removal of arsenic from drinking water Is not dependent on pH
- A.
True
- B.
False
- 11.No treatment systems that have been used successfully for removing iron and manganese may provide for call removal of arsenic
- A.
True
- B.
False
- 12.Most ion exchange are cynical removal plants are fully automated, but must be designed to permit Manual override upon demand
- A.
True
- B.
False
- 13.Currently, there are no readily available continuous, online arsenic measuring systems to monitor arsenic removal treatment processes
- A.
True
- B.
False
- 14.If a water utilities sources exceeded the arsenic MCL, the water utility to remove arsenic or too bland waters to meet the MCL
- A.
True
- B.
False
- 15.What are THM precursors
- A.
Disinfection byproducts
- B.
Natural organic compounds found after preliminary treatment
- C.
Natural organic compounds found in all surface and ground walkers
- D.
Organic compounds found in drinking water after chlorination
- 16.On what basis is the maximum contaminant level TTHM's established
- A.
A feasible level for compliance
- B.
Epidemiological studies
- C.
Results from current research studies
- D.
The health effects data
- 17.Why do some THM sample bottles contain a small amount of chemical reducing agent (usually sodium thiosulfate or sodium sulfite)
- A.
To facilitate the chemical reaction that occurs between chlorine and the THM precursors
- B.
To provide the chlorine essential for the formation of THMs
- C.
To provide the Natural organics essential for the formation of THMs
- D.
To stop the chemical reaction that occurs between chlorine in the THM precursors
- 18.When collecting water sample for THM analysis, why is it good practice to collect two samples at each location
- A.
To allow the lap to double check test results and it's a bottle breaks and other sample is available for testing
- B.
To compare the rates of THM formation
- C.
To keep the sample storage box properly balanced
- D.
To provide sample collected as an opportunity to compare procedures
- 19.What is a concern when using the ozone as a disinfectant
- A.
Ozone creates THM precursors
- B.
Ozone does not leave a residual and the treated water
- C.
Ozone generates disinfection byproducts
- D.
Ozone is relatively inexpensive
- 20.What term describes those treatment technologies used to remove arsenic that are considered technically and economically feasible
- A.
Best available technology (B.A.T)
- B.
Best management practices (BMP)
- C.
Economically feasible technology (EFT)
- D.
Maximum extent practical(MVP)
- 21.What is required for blending to be an acceptable arsenic treatment option
- A.
Appropriate monitoring and testing to ensure acceptable levels of arsenic
- B.
Desirable an acceptable to the consumers
- C.
Proper engineering, operation, and control
- D.
Thorough mixing before entering distribution system
- 22.What is the operators responsibility regarding a water treatment plants approved operating plan
- A.
To ensure that the plan is followed at all times
- B.
To modify the plan routinely, as needed, to reflect " real world " conditions
- C.
To prepare and keep up to date appropriate recordkeeping forms
- D.
The train all other operators in the effective use of the plan
- 23.What is the purpose of the arsenic sampling/monitoring for process control
- A.
To calculate conformance with the maximum contaminant level
- B.
To troubleshoot one investigate problems
- C.
To verify proper operation of arsenic removal treatment plant
- D.
To verify settings on process controls
- 24.Which items are example of organic compounds
- A.
Carbohydrates
- B.
Fats
- C.
Proteins
- D.
Salts
- E.
Vitamins
- 25.If arsenic treatment residual is deemed hazardous, the cost of treating the hazardous wastes may be prohibitive
- A.
True
- B.
False
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