Test your basic knowledge |

Environmental Engineering 2

Instructions:

Answer 36 questions in 15 minutes.
If you are not ready to take this test, you can study here.
Match each statement with the correct term.
Don't refresh. All questions and answers are randomly picked and ordered every time you load a test.

This is a study tool. The 3 wrong answers for each question are randomly chosen from answers to other questions. So, you might find at times the answers obvious, but you will see it re-enforces your understanding as you take the test each time.

1. Headloss change over time
Starts high then goes down like a parabolla as the particles settle then goes back up as it starts to jam
Forms clear interface between particles and supernatant( big word) - particles move around the water
Big Partices Catch little ones
Low BOD - High suspended solids - no control - does not match limits`

2. Goal for wastewater disinfection
De watering - belt press and centrifuge
No residual
Low BOD - High suspended solids - no control - does not match limits`
Remove viruses and bacteria that slipped through filter

3. Purpose of sedimentation in drinking water
Residual at tap
Chemically - Aerobically - Anaerobically
Always the same dose needed - but that dose is higher
Remove all flocculated particles

4. Purpose of sedimentation in waste water
De watering - belt press and centrifuge
Big Partices Catch little ones
Remove as many organic and non organic particles as possible
Particle in a medium - they don't interact with other particles

5. Adsorption and Charge Nuetralization
Need enough to make it happen - don't shear the floc though
Starts high then goes down like a parabolla as the particles settle then goes back up as it starts to jam
Optimal dose depends on charge and concentration
High pH and cold is bad

6. Point of pre treatment
Residual at tap
Add salt
Remove the dead pigs - stuff that would hurt the pumps
Need enough to make it happen - don't shear the floc though

7. Advantage/Disadvantage of Aerobic digestion
Always the same dose needed - but that dose is higher
Need enough to make it happen - don't shear the floc though
Residual at tap
Easy/Costly hard to dewater

8. Secondary Clairfier removes _____
Particle in a medium - they don't interact with other particles
Optimal dose depends on charge and concentration
Fixed films
Big Partices Catch little ones

9. What is special about chloramine
Need enough to make it happen - don't shear the floc though
Forms clear interface between particles and supernatant( big word) - particles move around the water
Always the same dose needed - but that dose is higher
Chemically - Aerobically - Anaerobically

10. Compression Settling
Turn a large number of small particles into a small number of large particles
Very pH dependent - grab pieces
High Molecular Weight Synthetics
Acts like a sponge - water moves around particles

11. Advantage of trickling filter
Cheap - low biosolids - resistant to shock - simple
Very pH dependent - grab pieces
Residual at tap
Sedimentation - suspended solids

12. Sedimentation
Cheap - low biosolids - resistant to shock - simple
Remove the dead pigs - stuff that would hurt the pumps
Want pH high for corrosion but lower for HOCL
Floating upside down

13. filtration is the...
Cheap - low biosolids - resistant to shock - simple
Chemically - Aerobically - Anaerobically
Remove as many organic and non organic particles as possible
Last chance to remove particles

14. Primary clarifier uses _____ removes _____
Discrete - floculation - hindered - compression
High Molecular Weight Synthetics
Remove as many organic and non organic particles as possible
Sedimentation - suspended solids

15. Purpose of Floculation
High Molecular Weight Synthetics
Remove as many organic and non organic particles as possible
Turn a large number of small particles into a small number of large particles
The second dip in the graph - free chlorine is formed

16. Land applicatioin worries
Low BOD - High suspended solids - no control - does not match limits`
Not in my back yard - nutrient overload - crops
Turn a large number of small particles into a small number of large particles
Floating upside down

17. Discrete Sedimentation

18. Stabilization 3 ways
No residual
Remove the dead pigs - stuff that would hurt the pumps
Chemically - Aerobically - Anaerobically
Particle in a medium - they don't interact with other particles

19. Goal for drinking water disinfection
Particle in a medium - they don't interact with other particles
Not in my back yard - nutrient overload - crops
Turn a large number of small particles into a small number of large particles
Residual at tap

20. 4 types of sedimentation
Turn a large number of small particles into a small number of large particles
Last chance to remove particles
De watering - belt press and centrifuge
Discrete - floculation - hindered - compression

21. Differential Sedimentatioin
Low BOD - High suspended solids - no control - does not match limits`
Fixed films
Big Partices Catch little ones
High pH and cold is bad

22. G
Forms clear interface between particles and supernatant( big word) - particles move around the water
Discrete - floculation - hindered - compression
RMS velocity gradient
Low BOD - High suspended solids - no control - does not match limits`

23. Dichotomy of energy level for floculation

24. Higher pH gives more
RMS velocity gradient
OCL
No residual
Optimal dose depends on charge and concentration

25. Compress double layer
Last chance to remove particles
Want pH high for corrosion but lower for HOCL
Discrete - floculation - hindered - compression
Add salt

26. Hinderded Settling
Forms clear interface between particles and supernatant( big word) - particles move around the water
OCL
Remove viruses and bacteria that slipped through filter
Optimal dose depends on charge and concentration

27. Disadvantages of trickling
Remove the dead pigs - stuff that would hurt the pumps
Remove viruses and bacteria that slipped through filter
Low BOD - High suspended solids - no control - does not match limits`
Chemically - Aerobically - Anaerobically

28. CL catch 22
Remove viruses and bacteria that slipped through filter
Want pH high for corrosion but lower for HOCL
Residual at tap
Settling of floculant particles

29. where is the break point in chlorination and what happens after
Particle in a medium - they don't interact with other particles
The second dip in the graph - free chlorine is formed
Cheap - low biosolids - resistant to shock - simple
De watering - belt press and centrifuge

30. Flocuation settling
Easy/Costly hard to dewater
Low BOD - High suspended solids - no control - does not match limits`
No residual
Settling of floculant particles

31. Bridging
Discrete - floculation - hindered - compression
High Molecular Weight Synthetics
Turn a large number of small particles into a small number of large particles
Sedimentation - suspended solids

32. 4 mechanisms
Add salt
Remove all flocculated particles
Last chance to remove particles
Compress double layer - adsoprtion and nuetralization - enmeshment - particle bridging

33. What is the effect of temperature and pH
Easy/Costly hard to dewater
High pH and cold is bad
Forms clear interface between particles and supernatant( big word) - particles move around the water
Residual at tap

34. Enmeshment in Sweep Floc
Big Partices Catch little ones
Very pH dependent - grab pieces
Fixed films
Compress double layer - adsoprtion and nuetralization - enmeshment - particle bridging

35. Disinfection
Remove viruses and bacteria that slipped through filter
Fixed films
The second dip in the graph - free chlorine is formed
Always the same dose needed - but that dose is higher

36. What is thickening - name 2 ways
Not in my back yard - nutrient overload - crops
De watering - belt press and centrifuge
Starts high then goes down like a parabolla as the particles settle then goes back up as it starts to jam
Particle in a medium - they don't interact with other particles