1.  A wastewater treatment pond should be less than 2 feet.

a.  True b.  False

2.  An oxidation pond is located after:

a.  The primary clarifier b.  The trickling filter c.  The secondary clarifier

3.  Bacteria that produce disease are called:

a.  Coliform b.  Facultative c.  Parasitic d.  Pathogenic e.  Saprophytes

4.  What tests can indicate pond performance?

a.  Carbon dioxide b.  Dissolved Oxygen & pH c.  Hardness d.  Methane

5.  Extending the contact time is generally more effective than increasing the chlorine dose to improve disinfection with chlorine.

a.  True b.  False

6.  Chlorinators should be located:

a.  In a separate room b.  In an adequately heated room c.  Near point of application d.  Outdoors

7.  Effluent should leave the final pond:

a.  At the surface b.  Just below the surface with a scum baffle around the outlet c.  At the bottom of the pond

8.  Which tests on samples from pond contents reveal if the pond is functioning properly?

a.  BOD b.  Chlorine residual c.  Coliforms d.  DO and pH

9.  You should never tamper with or apply heat to the fusible plug of a chlorine container.

a.  True b.  False

10.  Evaporators are used to remove moisture from the liquid chlorine delivery system.

a.  True b.  False

11.  Pond outfall should be

a.  Free b.  Submerged c.  Wherever it is convenient

12.  Ponds with long detention periods (more than 20 days) usually produce a better effluent than ponds with shorter detention times.

a.  True b.  False

13.  A facultative pond is poisoned by algae.

a.  True b.  False

14.  When starting a pond, wastewater should be added when the:

a.  Pond is empty b.  Seed algae are ready c.  Pond bottom is covered with at least one foot of water d.  Wind is blowing in the right direction e.  Bottom is covered with grass

15.  Postchlorination is generally more effective in a well-clarified effluent than in a turbid one.

a.  True b.  False

16.  Reduction in the number of organisms in wastewater may be accomplished by:

a.  Postchlorination b.  Prechlorination c.  Providing chlorine contact time d.  Sedimentation e.  All of the Above

17.  When chlorine is applied directly into the chlorine contact basin, the continuous influent flow provides the needed mixing action.

a.  True b.  False

18.  Facultative ponds are

a.  Aerobic on the top and anaerobic on the bottom b.  Completely aerobic c.  Faulty operating ponds d.  The most common type in current use e.  Very shallow ponds

19.  To protect downstream users of receiving waters, effluent from a wastewater treatment plant must be sterilized.

a.  True b.  False

20.  Dissolved oxygen in a pond is increased by:

a.  Algae liberating oxygen form the carbon dioxide molecule b.  Photosynthesis c.  Surface aerators d.  Wind action e.  All of the Above

21.  Ponds may not operate properly if:

a.  Temperatures stay below freezing for a long time b.  The influent contains a powerful fungicide c.  The influent has a high sulfur content d.  The influent organic matter content fluctuates tremendously every few days e.  All of the Above

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