OSSF DR TEST PRACTICE
_______-and-________-soil-textural-classes-are-always-unsuitable-for-standard-
absorptive-OSSF---ans-✔✔class-IA-and-IV
List-each-of-the-major-soil-horizons---ans-✔✔surface-soil-A,-surface-soil-B,-and-parent-
material
_____________-is-a-term-describing-the-ability-of-water-to-migrate-through-a-soil-
profile-under-either-_________-or-__________-conditions.---ans-✔✔Hydraulic-
conductivity,-saturated,-unsaturated
Interconnected-pores-in-the-soil-profile-allow-______-and-_______-to-enter-the-soil-at-
its-surface-and-migrate-downward---ans-✔✔air,-water
List-the-four-components-of-soil---ans-✔✔air,-water,-organics,-inorganics
A-drainfield-is-50-feet-by-90-feet-and-must-be-covered-with-an-average-of-15-inches-
of-sand-loam.-How-many-cubic-yards-of-sandy-loam-soil-must-be-purchased-(find-the-
volume-of-a-rectangular-object)?---ans-✔✔208.3-cubic-yards
What-would-be-the-volume-of-a-5-foot-diameter-pump-tank-that-is-5-feet-tall-with-the-
inlet-1-foot-below-the-rim?---ans-✔✔587-gals
What-would-be-the-percent-slope-on-a-lot-250-feet-deep-that-drops-20-feet-in-
elevation-over-the-depth-of-the-lot?---ans-✔✔8%
How-many-cubic-yards-of-gravel-would-be-needed-to-fill-a-ditch-3-feet-deep,-10-feet-
wide,-and-12-feet-long-with-18-inches-of-gravel?-1-cubic-yard-=-27-cubic-feet.---ans-
✔✔6.67-cubic-yards
A-septic-tank-is-6-feet-in-diameter-and-is-8-feet-deep.-How-many-gallons-will-it-hold-if-
the-overflow-line-is-located-half-way-up-from-the-bottom?---ans-✔✔846-gals
Calculate-the-working-liquid-capacity-(volume)-for-this-septic-tank.-SEE-PAGE-2-39!!---
ans-✔✔1077gals
What-is-the-surface-area-(area-in-square-feet)-of-an-evapotranspiration-system-40-
feet-wide-and-65-feet-long?---ans-✔✔2,600-sqft
, Figure-the-acreage-for-a-piece-of-property-that-measures-256-feet-on-each-of-four-
sides.---ans-✔✔1.5-acres
Figure-the-area-of-a-lot-that-measures-60ft-by-280ft---ans-✔✔16,800sqft-,0.39-acres
A-disposal-option-that-might-be-considered-in-a-clay-soil-would-be-a-________.---ans-
✔✔drip-or-spray-irrigation
The-primary-treatment-device-providing-the-least-or-poorest-treatment-of-domestic-
wastewater-would-be-_______.---ans-✔✔septic-tank
Nitrogen-or-nitrate-removal-in-soil-occurs-by-_________.---ans-✔✔vegetation-uptake
The-factors-influencing-the-survival-of-bacteria-in-soil-are-_______.---ans-✔✔moisture,-
temperature,-pH,-and-organic-matter.
Physical-removal-of-bacteria-by-straining-occurs-when-_______.---ans-✔✔the-bacteria-
are-larger-than-the-pore-openings-in-the-soil
A-solid-that-can-be-filtered-out-of-the-wastewater-is-a-_________.---ans-
✔✔suspended-solid
Which-of-the-following-describes-domestic-wastewater-as-it-leaves-a-home?---ans-
✔✔fresh,-light-in-color,-has-dissolved-oxygen
Which-of-the-following-are-problems-caused-by-malfunctioning-septic-tank-systems?---
ans-✔✔surface-water-pollution,-groundwater-contamination,-and-standing-sewage-in-
neighborhoods
An-inorganic-chemical-that-affects-human-health-is---ans-✔✔nitrate
Parasites-(helminths)-found-in-untreated-sewage-include-________.---ans-
✔✔hookworm,-round-worms,-and-tapeworms
Viruses-are-responsible-for-such-diseases-as---ans-✔✔poliomyelitis-and-infectious-
hepatitis
A-type-of-bacteria-that-indicates-sewage-contamination-is-________.---ans-✔✔fecal-
coliform
Protozoa-are-very-simple-animal-organisms-that-may-cause-________.---ans-
✔✔amoeba-dysentery-and-Giardiasis
Waterborne-diseases-that-spread-by-pathogenic-bacteria-include-_________.---ans-
✔✔typhoid,-cholera,-and-dysentery
_______-and-________-soil-textural-classes-are-always-unsuitable-for-standard-
absorptive-OSSF---ans-✔✔class-IA-and-IV
List-each-of-the-major-soil-horizons---ans-✔✔surface-soil-A,-surface-soil-B,-and-parent-
material
_____________-is-a-term-describing-the-ability-of-water-to-migrate-through-a-soil-
profile-under-either-_________-or-__________-conditions.---ans-✔✔Hydraulic-
conductivity,-saturated,-unsaturated
Interconnected-pores-in-the-soil-profile-allow-______-and-_______-to-enter-the-soil-at-
its-surface-and-migrate-downward---ans-✔✔air,-water
List-the-four-components-of-soil---ans-✔✔air,-water,-organics,-inorganics
A-drainfield-is-50-feet-by-90-feet-and-must-be-covered-with-an-average-of-15-inches-
of-sand-loam.-How-many-cubic-yards-of-sandy-loam-soil-must-be-purchased-(find-the-
volume-of-a-rectangular-object)?---ans-✔✔208.3-cubic-yards
What-would-be-the-volume-of-a-5-foot-diameter-pump-tank-that-is-5-feet-tall-with-the-
inlet-1-foot-below-the-rim?---ans-✔✔587-gals
What-would-be-the-percent-slope-on-a-lot-250-feet-deep-that-drops-20-feet-in-
elevation-over-the-depth-of-the-lot?---ans-✔✔8%
How-many-cubic-yards-of-gravel-would-be-needed-to-fill-a-ditch-3-feet-deep,-10-feet-
wide,-and-12-feet-long-with-18-inches-of-gravel?-1-cubic-yard-=-27-cubic-feet.---ans-
✔✔6.67-cubic-yards
A-septic-tank-is-6-feet-in-diameter-and-is-8-feet-deep.-How-many-gallons-will-it-hold-if-
the-overflow-line-is-located-half-way-up-from-the-bottom?---ans-✔✔846-gals
Calculate-the-working-liquid-capacity-(volume)-for-this-septic-tank.-SEE-PAGE-2-39!!---
ans-✔✔1077gals
What-is-the-surface-area-(area-in-square-feet)-of-an-evapotranspiration-system-40-
feet-wide-and-65-feet-long?---ans-✔✔2,600-sqft
, Figure-the-acreage-for-a-piece-of-property-that-measures-256-feet-on-each-of-four-
sides.---ans-✔✔1.5-acres
Figure-the-area-of-a-lot-that-measures-60ft-by-280ft---ans-✔✔16,800sqft-,0.39-acres
A-disposal-option-that-might-be-considered-in-a-clay-soil-would-be-a-________.---ans-
✔✔drip-or-spray-irrigation
The-primary-treatment-device-providing-the-least-or-poorest-treatment-of-domestic-
wastewater-would-be-_______.---ans-✔✔septic-tank
Nitrogen-or-nitrate-removal-in-soil-occurs-by-_________.---ans-✔✔vegetation-uptake
The-factors-influencing-the-survival-of-bacteria-in-soil-are-_______.---ans-✔✔moisture,-
temperature,-pH,-and-organic-matter.
Physical-removal-of-bacteria-by-straining-occurs-when-_______.---ans-✔✔the-bacteria-
are-larger-than-the-pore-openings-in-the-soil
A-solid-that-can-be-filtered-out-of-the-wastewater-is-a-_________.---ans-
✔✔suspended-solid
Which-of-the-following-describes-domestic-wastewater-as-it-leaves-a-home?---ans-
✔✔fresh,-light-in-color,-has-dissolved-oxygen
Which-of-the-following-are-problems-caused-by-malfunctioning-septic-tank-systems?---
ans-✔✔surface-water-pollution,-groundwater-contamination,-and-standing-sewage-in-
neighborhoods
An-inorganic-chemical-that-affects-human-health-is---ans-✔✔nitrate
Parasites-(helminths)-found-in-untreated-sewage-include-________.---ans-
✔✔hookworm,-round-worms,-and-tapeworms
Viruses-are-responsible-for-such-diseases-as---ans-✔✔poliomyelitis-and-infectious-
hepatitis
A-type-of-bacteria-that-indicates-sewage-contamination-is-________.---ans-✔✔fecal-
coliform
Protozoa-are-very-simple-animal-organisms-that-may-cause-________.---ans-
✔✔amoeba-dysentery-and-Giardiasis
Waterborne-diseases-that-spread-by-pathogenic-bacteria-include-_________.---ans-
✔✔typhoid,-cholera,-and-dysentery
