| 1. |
Which is not a typical fresh water source for producing potable water? |
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River |
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Lake |
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Deep groundwater |
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Ocean |
| 2. |
Desalination processes remove _____________ from seawater and brackish water. |
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Dissolved salts |
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Minerals |
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Dirt |
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Oxygen |
| 3. |
The molecular weight cut off for RO membrane performance is typically in the range of __________ daltons for organic chemicals. |
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50-100 |
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100-300 |
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300-500 |
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Greater than 500 |
| 4. |
During pretreatment a disinfectant, often chlorine, will be added to ________ biofouling and protect the membrane from degradation. |
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Increase |
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Reduce |
| 5. |
Installation and operation of a desalination facility will have the potential for adverse impacts on air quality, water/sea environment, and ground water. |
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True |
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False |
| 6. |
The figure below shows the treatment plant process sequence of a typical plant.
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Post-Treatment |
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Filtering |
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Desalination |
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None of the above |
| 7. |
_________________ subsurface intakes are more suitable for larger seawater desalination plants. |
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Vertical |
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Horizontal |
| 8. |
Open ocean intakes are suitable for all sizes of seawater desalination plants, but are typically more economical for plants of production capacity higher than ___________ . |
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20,000 m³/day |
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30,0000 m³/day |
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40,000 m³/day |
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50,000 m³/day |
| 9. |
The greatest single ecological impediment in selecting the site for a desalination facility is: |
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Economic Impact |
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Political Impact |
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Environmental Impact |
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None of the above |
| 10. |
Until the early 1990’s, __________ was the most commonly employed method of seawater desalination. |
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Multistage flash distillation |
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Thermal Desalination |
| 11. |
There is no direct contact between the heating steam system and the desalination process: |
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True |
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False |
| 12. |
Membrane desalination is a process of separation of _____________ from the source water using semipermeable membranes. |
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Oxygen |
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Debris |
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Minerals |
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None of the above |
| 13. |
Salt rejection refers to the effectiveness of a membrane to ____________ salts from solution. |
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Remove |
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Add |
| 14. |
The figure above is an RO membrane with a _____________ pressure pump.
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High |
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Low |
| 15. |
_______________ is the most widely used disinfection method. |
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Desalination |
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Boiling |
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Chlorination |
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None of the above |
| 16. |
The figure above is of a ______________ unit.
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Small distiller |
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Vapour compression |
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Desalination |
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None of the above |
| 17. |
Pre-treatment of the source after intake water is normally designed to remove contaminants that will interfere with the __________ process such as by scale formation or fouling membranes. |
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Disinfecting |
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Post treatment |
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Desalination |
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Distilling |
| 18. |
The quality of the blended water is particularly relevant if mixing of incompletely treated water with desalinated water occurs __________ distribution. |
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Prior to |
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After |
| 19. |
Thermal processes generally require _________ pretreatment than membrane based processes. |
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More |
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Less |
| 20. |
General principles of post-treatment disinfection of desalinated water _______________ those of disinfection of freshwater sources of drinking water. |
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are similar |
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vary from |
| 21. |
Public health addresses: |
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the quality of life |
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improvement in community health |
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potential risks associated directly or indirectly with the desalination project |
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All of the above |
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