1 Exampromax - Stuvia US 2025/2026
OSSF DR TEST PRACTICE Questions and
Answers (100% Correct Answers) Already
Graded A+
Quiz: _______ and ________ soil textural classes are always unsuitable for
standard absorptive OSSF⼀Answer: class IA and IV
Quiz: List each of the major soil horizons⼀Answer: surface soil A,
© 2025 Assignment Expert
surface soil B, and parent material
Exampromax - Stuvia US
Quiz: _____________ is a term describing the ability of water to migrate
through a soil profile under either _________ or __________ conditions.⼀
Answer: Hydraulic conductivity, saturated, unsaturated
Quiz: Interconnected pores in the soil profile allow ______ and _______
to enter the soil at its surface and migrate downward⼀Answer: air, water
Quiz: List the four components of soil⼀Answer: air, water, organics,
inorganics
Quiz: 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)?⼀Answer:
208.3 cubic yards
Quiz: 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?⼀Answer: 587 gals
, 2 Exampromax - Stuvia US 2025/2026
Quiz: What would be the percent slope on a lot 250 feet deep that drops
20 feet in elevation over the depth of the lot?⼀Answer: 8%
Quiz: 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.⼀Answer: 6.67 cubic yards
Quiz: 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
© 2025 Assignment Expert
bottom?⼀Answer: 846 gals
Exampromax - Stuvia US
Quiz: Calculate the working liquid capacity (volume) for this septic tank.
SEE PAGE 2-39!!⼀Answer: 1077gals
Quiz: What is the surface area (area in square feet) of an
evapotranspiration system 40 feet wide and 65 feet long?⼀Answer: 2,600
sqft
Quiz: Figure the acreage for a piece of property that measures 256 feet on
each of four sides.⼀Answer: 1.5 acres
Quiz: Figure the area of a lot that measures 60ft by 280ft⼀Answer:
16,800sqft ,0.39 acres
Quiz: A disposal option that might be considered in a clay soil would be
a ________.⼀Answer: drip or spray irrigation
, 3 Exampromax - Stuvia US 2025/2026
Quiz: The primary treatment device providing the least or poorest
treatment of domestic wastewater would be _______.⼀Answer: septic tank
Quiz: Nitrogen or nitrate removal in soil occurs by _________.⼀Answer:
vegetation uptake
Quiz: The factors influencing the survival of bacteria in soil are _______.
⼀Answer: moisture, temperature, pH, and organic matter.
Physical removal of bacteria by straining occurs when _______.⼀
© 2025 Assignment Expert
Quiz:
Answer: the bacteria are larger than the pore openings in the soil
Exampromax - Stuvia US
Quiz: A solid that can be filtered out of the wastewater is a _________.⼀
Answer: suspended solid
Quiz: Which of the following describes domestic wastewater as it leaves a
home?⼀Answer: fresh, light in color, has dissolved oxygen
Quiz: Which of the following are problems caused by malfunctioning
septic tank systems?⼀Answer: surface water pollution, groundwater
contamination, and standing sewage in neighborhoods
Quiz: An inorganic chemical that affects human health is⼀Answer:
nitrate
Quiz: Parasites (helminths) found in untreated sewage include ________.
⼀Answer: hookworm, round worms, and tapeworms
OSSF DR TEST PRACTICE Questions and
Answers (100% Correct Answers) Already
Graded A+
Quiz: _______ and ________ soil textural classes are always unsuitable for
standard absorptive OSSF⼀Answer: class IA and IV
Quiz: List each of the major soil horizons⼀Answer: surface soil A,
© 2025 Assignment Expert
surface soil B, and parent material
Exampromax - Stuvia US
Quiz: _____________ is a term describing the ability of water to migrate
through a soil profile under either _________ or __________ conditions.⼀
Answer: Hydraulic conductivity, saturated, unsaturated
Quiz: Interconnected pores in the soil profile allow ______ and _______
to enter the soil at its surface and migrate downward⼀Answer: air, water
Quiz: List the four components of soil⼀Answer: air, water, organics,
inorganics
Quiz: 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)?⼀Answer:
208.3 cubic yards
Quiz: 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?⼀Answer: 587 gals
, 2 Exampromax - Stuvia US 2025/2026
Quiz: What would be the percent slope on a lot 250 feet deep that drops
20 feet in elevation over the depth of the lot?⼀Answer: 8%
Quiz: 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.⼀Answer: 6.67 cubic yards
Quiz: 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
© 2025 Assignment Expert
bottom?⼀Answer: 846 gals
Exampromax - Stuvia US
Quiz: Calculate the working liquid capacity (volume) for this septic tank.
SEE PAGE 2-39!!⼀Answer: 1077gals
Quiz: What is the surface area (area in square feet) of an
evapotranspiration system 40 feet wide and 65 feet long?⼀Answer: 2,600
sqft
Quiz: Figure the acreage for a piece of property that measures 256 feet on
each of four sides.⼀Answer: 1.5 acres
Quiz: Figure the area of a lot that measures 60ft by 280ft⼀Answer:
16,800sqft ,0.39 acres
Quiz: A disposal option that might be considered in a clay soil would be
a ________.⼀Answer: drip or spray irrigation
, 3 Exampromax - Stuvia US 2025/2026
Quiz: The primary treatment device providing the least or poorest
treatment of domestic wastewater would be _______.⼀Answer: septic tank
Quiz: Nitrogen or nitrate removal in soil occurs by _________.⼀Answer:
vegetation uptake
Quiz: The factors influencing the survival of bacteria in soil are _______.
⼀Answer: moisture, temperature, pH, and organic matter.
Physical removal of bacteria by straining occurs when _______.⼀
© 2025 Assignment Expert
Quiz:
Answer: the bacteria are larger than the pore openings in the soil
Exampromax - Stuvia US
Quiz: A solid that can be filtered out of the wastewater is a _________.⼀
Answer: suspended solid
Quiz: Which of the following describes domestic wastewater as it leaves a
home?⼀Answer: fresh, light in color, has dissolved oxygen
Quiz: Which of the following are problems caused by malfunctioning
septic tank systems?⼀Answer: surface water pollution, groundwater
contamination, and standing sewage in neighborhoods
Quiz: An inorganic chemical that affects human health is⼀Answer:
nitrate
Quiz: Parasites (helminths) found in untreated sewage include ________.
⼀Answer: hookworm, round worms, and tapeworms
