WQA 2011 Educational Newsletter Quiz 2

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OnSite Sewage Treatment Alternatives (.25 CPD)
7/10 Required to pass

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1. Why does sewage need to be treated?

A. To reduce space in landfills

B. To extract reusable minerals

C. To provide black water for reuse

D. To prevent disease

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2. Which technique is used at the primary treatment stage to remove solids?

A. Septic tank

B. Gravity separation

C. Effluent discharge

D. Centripetal force

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3. In addition to destruction by oxygen, what other methods can be used to remove pathogens in secondary treatment?

A. Digestion by acid

B. Physical straining

C. Ultraviolet disinfection

D. Chlorination

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4. Which contaminants are removed in the advanced treatment process?

A. Nitrogen compounds

B. Dissolved gasses

C. Pathogens

D. Hardness ions

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5. Which stage of treatment must be completed before effluent may be dispersed below the surface?

A. Primary

B. Secondary

C. Tertiary

D. Advanced Treatment

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6. What are the two components of a conventional onsite sewage system?

A. Advanced treatment unit and pump chamber

B. Aerobic digestion and filtration

C. Anaerobic digestion and filtration

D. Septic tank and soil absorption field

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7. Whatâ€™s the most common cause of septic tank failure?

A. Inadequate cleaning of the tank to remove solids

B. Presence of microorganisms in the soil absorption field

C. Presence of wastewater from a water softener

D. Use of a too large soil absorption field

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8. Since onsite sewage treatment systems are sized based on usage patterns, how could peak use volumes that exceed capacity impact operation?

A. If average monthly use within design capacity, no impact

B. Peak use over capacity leads to clogging and system failure

C. If the composition of waste is within design parameters, no impact

D. Peak use over capacity only impacts efficacy of secondary treatment

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9. What discharge options do aerobic treatment units offer that conventional units do not?

A. Direct discharge to sanitary sewer

B. Below ground soil dispersal

C. Direct to black water collection tank

D. Direct to surface water stream

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10. Which level of treatment is not included with conventional units, but is standard with aerobic treatment units?

A. Primary

B. Secondary

C. Tertiary

D. Quaternary

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