OSSF DR TEST PRACTICE
QUESTIONS 2025 |GUARANTEED
ACCURATE ANSWERS
_______ and ________ soil textural classes are always unsuitable for
standard absorptive OSSF - ACCURATE ANSWERS✔✔ class IA and
IV
List each of the major soil horizons - ACCURATE ANSWERS✔✔
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.
- ACCURATE ANSWERS✔✔ Hydraulic conductivity, saturated,
unsaturated
Interconnected pores in the soil profile allow ______ and _______ to
enter the soil at its surface and migrate downward - ACCURATE
ANSWERS✔✔ air, water
List the four components of soil - ACCURATE ANSWERS✔✔ 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)? - ACCURATE
ANSWERS✔✔ 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? - ACCURATE ANSWERS✔✔
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? - ACCURATE ANSWERS✔✔
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. - ACCURATE ANSWERS✔✔ 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? -
ACCURATE ANSWERS✔✔ 846 gals
Calculate the working liquid capacity (volume) for this septic tank. SEE
PAGE 2-39!! - ACCURATE ANSWERS✔✔ 1077gals
, What is the surface area (area in square feet) of an evapotranspiration
system 40 feet wide and 65 feet long? - ACCURATE ANSWERS✔✔
2,600 sqft
Figure the acreage for a piece of property that measures 256 feet on each
of four sides. - ACCURATE ANSWERS✔✔ 1.5 acres
Figure the area of a lot that measures 60ft by 280ft - ACCURATE
ANSWERS✔✔ 16,800sqft ,0.39 acres
A disposal option that might be considered in a clay soil would be a
________. - ACCURATE ANSWERS✔✔ drip or spray irrigation
The primary treatment device providing the least or poorest treatment of
domestic wastewater would be _______. - ACCURATE ANSWERS✔✔
septic tank
Nitrogen or nitrate removal in soil occurs by _________. - ACCURATE
ANSWERS✔✔ vegetation uptake
The factors influencing the survival of bacteria in soil are _______. -
ACCURATE ANSWERS✔✔ moisture, temperature, pH, and organic
matter.
QUESTIONS 2025 |GUARANTEED
ACCURATE ANSWERS
_______ and ________ soil textural classes are always unsuitable for
standard absorptive OSSF - ACCURATE ANSWERS✔✔ class IA and
IV
List each of the major soil horizons - ACCURATE ANSWERS✔✔
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.
- ACCURATE ANSWERS✔✔ Hydraulic conductivity, saturated,
unsaturated
Interconnected pores in the soil profile allow ______ and _______ to
enter the soil at its surface and migrate downward - ACCURATE
ANSWERS✔✔ air, water
List the four components of soil - ACCURATE ANSWERS✔✔ 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)? - ACCURATE
ANSWERS✔✔ 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? - ACCURATE ANSWERS✔✔
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? - ACCURATE ANSWERS✔✔
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. - ACCURATE ANSWERS✔✔ 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? -
ACCURATE ANSWERS✔✔ 846 gals
Calculate the working liquid capacity (volume) for this septic tank. SEE
PAGE 2-39!! - ACCURATE ANSWERS✔✔ 1077gals
, What is the surface area (area in square feet) of an evapotranspiration
system 40 feet wide and 65 feet long? - ACCURATE ANSWERS✔✔
2,600 sqft
Figure the acreage for a piece of property that measures 256 feet on each
of four sides. - ACCURATE ANSWERS✔✔ 1.5 acres
Figure the area of a lot that measures 60ft by 280ft - ACCURATE
ANSWERS✔✔ 16,800sqft ,0.39 acres
A disposal option that might be considered in a clay soil would be a
________. - ACCURATE ANSWERS✔✔ drip or spray irrigation
The primary treatment device providing the least or poorest treatment of
domestic wastewater would be _______. - ACCURATE ANSWERS✔✔
septic tank
Nitrogen or nitrate removal in soil occurs by _________. - ACCURATE
ANSWERS✔✔ vegetation uptake
The factors influencing the survival of bacteria in soil are _______. -
ACCURATE ANSWERS✔✔ moisture, temperature, pH, and organic
matter.
