| 1. |
The bacterial decomposition and stabilization of sewage in the presence of free oxygen is called ________________________. |
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Aerobic digestion |
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Anaerobic digestion |
| 2. |
Borehole is a drilled hole of four feet or greater in depth and one to three feet in diameter. |
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True |
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False |
| 3. |
A sewage collection, treatment, and disposal system designed to serve two or more sewage-generating units on separate legal tracts where the total combined flow from all units does not exceed 5,000 gallons per day is called a _______________________. |
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Cluster system |
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Composting toilet |
| 4. |
Grease interceptors are floatation chambers where grease floats to the water surface and is retained while the clearer water underneath is discharged. |
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True |
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False |
| 5. |
_____________________ is a tank placed ahead of a treatment unit that functions as an interceptor for materials such as plastics, clothing, hair, and grease that are potentially harmful to treatment unit components. |
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Pretreatment tank |
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Post-treatment tank |
| 6. |
Scum is a mass of organic or inorganic matter which floats on the surface of sewage. |
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True |
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False |
| 7. |
A semi-liquid mass of partially decomposed organic and inorganic matter which settles at or near the bottom of a receptacle containing sewage is termed as ________________. |
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Sludge |
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Soil |
| 8. |
The site evaluator shall either drill two soil borings or excavate two backhoe pits at opposite ends of the proposed disposal area to determine the characteristics of the soil. |
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True |
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False |
| 9. |
The pipe from the sewer stub out to the treatment system should be constructed of steel & plastic. |
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True |
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False |
| 10. |
All septic tanks shall be divided into two or three compartments by the use of baffles or by connecting two or more tanks in a series. |
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True |
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False |
| 11. |
Two or more tanks are arranged in series to attain the required liquid volume. The first tank in a two-tank system shall contain at least one-half the required volume. The first tank in a three-tank system shall contain at least one-third of the total required volume, but no less than 500 gallons. |
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True |
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False |
| 12. |
The septic tank shall be designed and constructed so that all joints, seams, component parts, and fittings______________________ from entering the tank, and ____________________ from exiting the tank, except through designed inlet and outlet openings. |
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Prevent wastewater, prevent groundwater |
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Prevent groundwater, prevent wastewater |
| 13. |
Which formula is used for leaching chambers without water saving devices? |
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L = 0.75A/(W+2) |
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L = 0.6A/(W+2) |
| 14. |
The drainfield layout shall consist of a matrix of small-diameter pressurized lines, buried at least six inches deep, and pressure reducing emitters spaced at a maximum of 30-inch intervals. |
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True |
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False |
| 15. |
Pump tanks may not be necessary when the septic tank outlet is at a lower elevation than the disposal field or for systems that require pressure disposal |
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True |
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False |
| 16. |
If condensate lines are plumbed directly into an OSSF, the increased water volume must be accounted for (added to the usage rate) in the system planning materials. |
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True |
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False |
| 17. |
A site evaluator should possess a current license from the customers. |
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True |
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False |
| 18. |
An installer should construct the OSSF that has been authorized by the permitting authority for the specific location identified in the site evaluation. |
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True |
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False |
| 19. |
An apprentice possesses a current registration from the ____________________. |
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Customers |
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Executive director |
| 20. |
A maintenance provider should satisfy the requirements of the maintenance contract between the homeowner of the OSSF system and the maintenance provider. |
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True |
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False |
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