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2024 DESIGNATED REPRESENTATIVE OSSF EXAM WITH CORRECT ANSWERS
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2024 DESIGNATED REPRESENTATIVE OSSF EXAM WITH CORRECT ANSWERS
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2024 DESIGNATEDREPRESENTATIVE OSSF EXAM
WITH CORRECT ANSWERS
Domestic wastewater contains microorganisms that are capable of causing -
CORRECT-ANSWERSInfectious diseases
microorganisms that cause disease - CORRECT-ANSWERSPathogens
Microorganisms in wastewater - CORRECT-ANSWERSBacteria, viruses,
protozoa, helminths
Waterborne diseases which spread by pathogenic bacteria - CORRECT-
ANSWERSTyphoid, cholera, and dysentery
Protozoa are very simple animal organisms which may cause - CORRECT-
ANSWERSAmoebic dysentery and giardiasis
Type of bacteria indicates sewage contamination - CORRECT-ANSWERSFecal
Coliform
Viruses responsible for such diseases as - CORRECT-ANSWERSpoliomyelitis &
infectious hepatitis
Parasites in untreated sewage include - CORRECT-ANSWERSBookworm round
worms tapeworms
An inorganic chemical which affects human health - CORRECT-
ANSWERSNitrate
Malfunctioning septic tank systems cause serious problems such as -
CORRECT-ANSWERSSurface water pollution, standing sewage in
neighborhoods, groundwater contamination
Water resources are vital because water is necessary for - CORRECT-
ANSWERSAgriculture, human life, economic viability in an area
Domestic wastewater is normally _______ as it leaves a home - CORRECT-
ANSWERSFresh, has dissolved oxygen, light in color, considered dangerous
, A solid that can be filtered out of the wastewater - CORRECT-
ANSWERSSuspended solid
Physical removal of bacteria by straining occurs when - CORRECT-
ANSWERSThe bacteria are larger than the pore openings in the soil
The factors influencing the survival of bacteria in soil are - CORRECT-
ANSWERSMoisture, temperature, pH, & organic matter
Nitrogen or nitrate removal in soil occurs by - CORRECT-ANSWERSVegetation
uptake
Primary treatment device providing the least or poorest treatment of
domestic wastewater would be - CORRECT-ANSWERSSeptic tank
Disposal option considered in clay soil would be - CORRECT-ANSWERSDrip or
spray irrigation
List 4 components of soil - CORRECT-ANSWERSAir, water, organics,
inorganics
Interconnected pores in the soil profile allow ___ & ___ to enter the soil at its
surface and migrate downward - CORRECT-ANSWERSAir/water
The ability of water to migrate through a soil profile under either saturated or
unsaturated conditions - CORRECT-ANSWERSHydraulic conductivity
List each of the major soil horizons - CORRECT-ANSWERSSurface Soil A,
Subsoil B, Parent Material
Soil textural classes which are always unsuitable for a standard absorptive
OSSF - CORRECT-ANSWERSClass Ib & Class IV
Class II Soils include USDA classes of - CORRECT-ANSWERSSandy loam &
loam
A tool to graphically delineate soil textural classes - CORRECT-
ANSWERSUSDA soil textural triangle
List the two unsuitable types of soil structure or structural condition -
CORRECT-ANSWERSPlaty & Massive
A soil color pattern of orange and brown on a background of gray or bluish
color - CORRECT-ANSWERSMottling
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