Arkansas Onsite Wastewater Rules And Regulations Quiz
This quiz was created to assist new EHS in studying for the "DR Exam". It will cover questions about the Arkansas Department of Health "Rules and Regulations Pertaining to Onsite Wastewater" and related memos.
Questions and Answers
- 1.
In a pre-1977 subdivision, how many gallons per day should a DR design for a 4 bedroom home?
- A.
600 gpd
- B.
450 gpd
- C.
There were no regulations before 1977.
- D.
370 gpd
Correct Answer
A. 600 gpdExplanation
Until 1977, septic systems were designed based on "Bulletin 9" rules. So, in a pre-1977 subdivision, the designer must design for 150 gallons per bedroom. If they choose not to do that and instead want to use current GPD sizing, then they must design both a primary and secondary area. See memo EHGS 0015 issued 10-19-15.Rate this question:
-
- 2.
Subdivisions platted, approved and recorded prior to July 1, 1977 will be required to have both a primary and secondary disposal area.
- A.
True
- B.
False
Correct Answer
B. FalseExplanation
The secondary areas weren't required until July 1, 1977. See Memo EHGS 0015.Rate this question:
-
- 3.
A standard septic system is being designed on a lot that was platted in 1972. The lot is 1/8 mi from Beaver Water District's intake structure. The concrete, water-tight tank is 197 feet from the high water mark of Beaver Lake. The absorption field is 303 ft from the lake. Will you approve the permit?
- A.
Yes, the 100 ft setback is met.
- B.
No, the 300 ft setback is not met by the tank.
- C.
Yes, the absorption field is greater than 300 ft from the lake.
- D.
No, the system is within 1/4 mile of the Beaver Lake Intake Structure.
Correct Answer
B. No, the 300 ft setback is not met by the tank.Explanation
If a lot is within 1/4 mile of the intake on a public water supply lake, then all parts of the septic system must be 300 ft from the high water mark of that lake. If that cannot be done, then the system must be designed for pre-treatment and preferably, disinfection.Rate this question:
-
- 4.
A 10 acre parcel of land is 3 miles from a public water intake. The proposed septic system is 158 ft from high water mark of the lake. Will pre-treatment be required as part of the design? (choose the best answer)
- A.
Yes, it is within 300 ft of a drinking water supply lake.
- B.
Yes, because all lake lots must have pre-treatment.
- C.
No, it is greater than 1/4 mile from an intake AND is greater than 100 ft from the lake.
Correct Answer
C. No, it is greater than 1/4 mile from an intake AND is greater than 100 ft from the lake.Explanation
The proposed septic system is 158 ft from the high water mark of the lake, which is greater than 100 ft. Additionally, it is stated that the land is 3 miles from a public water intake, which is greater than 1/4 mile. Therefore, based on these conditions, pre-treatment will not be required as part of the design.Rate this question:
-
- 5.
What is the purpose of the minimum 5 ft of squirt height in LPD systems?
- A.
It is an engineering constant used in calculations.
- B.
Sch 40 requires at least 5 ft of head
- C.
The installers like to see the EHS try to measure 5 ft of squiriting wastewater.
- D.
To keep the orifice holes scoured out.
Correct Answer
D. To keep the orifice holes scoured out.Explanation
The purpose of the minimum 5 ft of squirt height in LPD systems is to keep the orifice holes scoured out. This means that the force of the squirting wastewater helps to prevent any blockages or build-up in the orifice holes, ensuring that the system continues to function properly. This requirement helps to maintain the efficiency and effectiveness of the LPD system by preventing any potential clogging issues.Rate this question:
-
- 6.
Which of these is considered Residential Strength Effluent?
- A.
1000 ppm BOD, 25pmm TSS, 600 ppm FOG
- B.
500 ppm BOD, 40 ppm TSS, 30 ppm FOG
- C.
200 ppm BOD, 77 ppm TSS, 9 ppm FOG
- D.
100 ppm BOD, 400ppm TSS, 20 ppm FOG
Correct Answer
C. 200 ppm BOD, 77 ppm TSS, 9 ppm FOGExplanation
Residential strength effluent is less than or equal to: 300ppm BOD, 300 ppm TSS and 25ppm Fats, Oil & Grease.Rate this question:
-
- 7.
What are the 3 layers in a septic tank?
- A.
Sludge, Scum, and Clarified Effluent
- B.
Influent, Effluent, and Sludge.
- C.
Inlet, Outlet, Riser.
- D.
Sludge, Scum,and Anoxic Biofilm Zone.
Correct Answer
A. Sludge, Scum, and Clarified EffluentExplanation
Sludge is what sinks. Scum is what floats. The Clarified Effluent is the layer in the middle that has less solids and is discharged to the absorption field.Rate this question:
-
- 8.
Which one of these is considered a subdivision?
- A.
Land that is subdivided in to 5 or more tracts that are 5 acres or more in size.
- B.
Land that is divided into 3 or more tracts and any of them are 3 acres or less.
- C.
Land that is divided into 2 or more tracts.
- D.
Land that is subdivided and any of the the lots are 10 acres or more.
Correct Answer
B. Land that is divided into 3 or more tracts and any of them are 3 acres or less.Explanation
"Land divided or proposed to be divided for predominantly residential
purposes into such parcels as required by local ordinances, or, in the absence of local
ordinances, subdivision means any land which is divided or proposed to be divided by a
common owner or owners for predominantly residential purposes into 3 or more lots or
parcels, platted or unplatted units any of which contains less than three acres, as a part of
a uniform plan of development."
However, if the city or county considers them a formal subdivision, then we will also require subdivision review. Follow whatever regulation has the most restrictive definition of a subdivision.Rate this question:
-
- 9.
Who can design a septic system?
- A.
Designated Representative
- B.
Septic System Installer
- C.
Master Plumber
- D.
Homeowner
Correct Answer
A. Designated RepresentativeExplanation
A Designated Representative can design a septic system. This individual is specifically designated and authorized by the relevant authorities to create plans and designs for septic systems. They have the necessary knowledge and expertise in the field to ensure that the system is properly designed and meets all regulatory requirements. This role is important in ensuring that septic systems are designed in a safe and efficient manner.Rate this question:
-
- 10.
Who can inspect the construction of a septic system?
- A.
Arkansas Department of Health
- B.
Designated Representative
- C.
Both 1 & 2.
- D.
Homeowner
Correct Answer
C. Both 1 & 2.Explanation
The DR can inspect the installation of a system, but cannot issue the Permit for Operation. They would still collect shots, sign the "Inspected By" on the EHP-19 and turn into the LHU. Only then will we sign a Permit for Operation.
The Homeowner has the right to install their own septic, but not to design it (exception is the 10 acre exemption)Rate this question:
-
- 11.
If the stubout of a home is within ft of a sanitary sewer line, then they must tie to public sewer instead of a installing a septic system.
- A.
100 ft
- B.
1000 ft
- C.
300 ft
- D.
500 ft
Correct Answer
C. 300 ftExplanation
If the stubout of a home is within 300 ft of a sanitary sewer line, then they must tie to public sewer instead of installing a septic system.Rate this question:
-
- 12.
After a site evaluation is complete and the design is approved, the EHS will issue a to the applicant?
- A.
Permit for Construction
- B.
Permit for Operation
- C.
Building Permit
- D.
Temporary Permit
Correct Answer
A. Permit for ConstructionExplanation
After a site evaluation is complete and the design is approved, the EHS will issue a Permit for Construction to the applicant. This permit allows the applicant to proceed with the construction activities on the site. It indicates that all necessary environmental, health, and safety requirements have been met and that the construction can be carried out in compliance with regulations. The Permit for Construction is typically required before any construction work can begin on a site.Rate this question:
-
- 13.
After the septic system is installed as designed and inspected, the EHS will issue a ?
- A.
Permit for Construction
- B.
Temporary Permit
- C.
Building Permit
- D.
Permit for Operation
Correct Answer
D. Permit for OperationExplanation
After the septic system is installed as designed and inspected, the EHS will issue a Permit for Operation. This permit allows the owner or operator to legally operate the septic system and ensures that it meets all necessary health and safety requirements. It signifies that the system is in compliance with regulations and can be used for its intended purpose.Rate this question:
-
- 14.
Beaver Shore Subdivision was platted in 1972. A home constructed in 2016 will require a primary and a secondary area.
- A.
True
- B.
False
Correct Answer
B. FalseExplanation
Since it is pre-1977, only a primary is required. However, it should be sized using 150 gallons per bedroom. If that cannot be done, then a secondary area is required. See Memo EHS 0015.Rate this question:
-
- 15.
If a spring is used as a public water supply, how many feet away must any septic system be?
- A.
100 ft
- B.
500 ft
- C.
300 ft
- D.
1000 ft
Correct Answer
C. 300 ftExplanation
A septic system must be located at least 300 feet away from a spring used as a public water supply. This distance is necessary to prevent contamination of the water source by any potential sewage or waste from the septic system. By maintaining a sufficient distance, the risk of harmful bacteria or pollutants reaching the water supply is minimized, ensuring the safety and quality of the water for public consumption.Rate this question:
-
- 16.
What is the setback to a stream or river?
- A.
300 ft
- B.
100 ft
- C.
50 ft
- D.
1/4 mile
Correct Answer
B. 100 ftExplanation
The setback to a stream or river refers to the distance that should be maintained between a development or structure and the water body. A setback of 100 ft means that any construction or activity should be at least 100 ft away from the stream or river. This distance is important to protect the water body from potential pollution, erosion, and other negative impacts. It also helps to preserve the natural habitat and maintain the overall health of the stream or river ecosystem.Rate this question:
-
- 17.
What is the setback to a pond that is on your property?
- A.
50 ft
- B.
75 ft
- C.
100 ft
- D.
300 ft
Correct Answer
A. 50 ftExplanation
The setback to a pond that is on your property is 50 ft. This means that there must be a distance of 50 ft between the pond and any structures or property boundaries. This setback is likely in place to ensure that there is enough space for the pond to function properly and to prevent any potential issues such as flooding or contamination.Rate this question:
-
- 18.
What is the setback to a pond that is on a neighboring property?
- A.
50 ft
- B.
75 ft
- C.
100 ft
- D.
1/4 mile
Correct Answer
C. 100 ftExplanation
The setback to a pond on a neighboring property is 100 ft. This means that there must be a distance of 100 ft between the pond and any structures or boundaries on the neighboring property. This setback is likely in place to ensure that there is enough space for the pond to function properly and to prevent any potential issues such as flooding or contamination from nearby structures.Rate this question:
-
- 19.
What is the setback to a structure?
- A.
100 ft
- B.
No minimum
- C.
10 ft
- D.
20 ft
Correct Answer
C. 10 ftExplanation
A setback to a structure refers to the minimum distance that must be maintained between the structure and the property line or neighboring buildings. In this case, the correct answer is 10 ft, which means that the structure must be at least 10 ft away from the property line or neighboring buildings. This setback requirement ensures safety, privacy, and proper use of space between different structures.Rate this question:
-
- 20.
What is the setback to a closed-loop geothermal well?
- A.
50 ft
- B.
100 ft
- C.
300 ft
- D.
500 ft
Correct Answer
A. 50 ftExplanation
The setback to a closed-loop geothermal well is 50 ft. This means that the well needs to be at least 50 ft away from any other structure or property line. This is to ensure that there is enough space for the well to operate efficiently and safely. Placing the well too close to other structures or property lines can cause interference with the geothermal system and potentially lead to damage or inefficiency.Rate this question:
-
- 21.
What is the setback to an open loop geothermal well?
- A.
50 ft
- B.
100 ft
- C.
300 ft
- D.
500 ft
Correct Answer
B. 100 ftExplanation
The setback to an open loop geothermal well is 100 ft. This means that the well needs to be at least 100 ft away from any water supply, such as a river or lake, to avoid any interference or contamination. This distance ensures that the geothermal system operates efficiently and safely without any negative impact on the surrounding water sources.Rate this question:
-
- 22.
What is the required setback between any part of a septic system and a sinkhole?
- A.
There is no required setback.
- B.
100 ft
- C.
50 ft
- D.
300 ft
Correct Answer
B. 100 ftExplanation
The required setback between any part of a septic system and a sinkhole is 100 ft. This means that there should be a distance of at least 100 ft between the septic system and any sinkhole. This is important to prevent any potential contamination of the sinkhole by the septic system, as well as to ensure the stability and safety of the septic system itself.Rate this question:
-
- 23.
Which one of these describes a Brief Seasonal Water Table?
- A.
10 YR 6/2 less than 50% of ped
- B.
78 % clay with few Fe nodules
- C.
Common 3mm Fe nodules
- D.
7.5YR 10/1 greater than 50% of ped
Correct Answer
C. Common 3mm Fe nodulesExplanation
A Brief Seasonal Water Table is described by the presence of Common 3mm Fe nodules.Rate this question:
-
- 24.
Which one of these is an indicator of a Brief Seasonal Water Table?
- A.
Manganese nodules greater than 2mm diameter
- B.
Clay greater than 35%
- C.
Chroma 2 less than 20%
- D.
Chroma 3 greater than 30%
Correct Answer
A. Manganese nodules greater than 2mm diameterExplanation
Manganese nodules greater than 2mm diameter can indicate a brief seasonal water table because they are formed when groundwater rises and brings manganese minerals to the surface. This suggests that there is periodic saturation of the soil, leading to the formation of these nodules. The other options, clay greater than 35%, chroma 2 less than 20%, and chroma 3 greater than 30%, do not directly relate to the presence of a brief seasonal water table.Rate this question:
-
- 25.
Which of these describes a Moderate Seasonal Water Table?
- A.
Fe concretions less than 20%, Clay percentage 17%, loamy.
- B.
10YR 6/1 35%, Clay 56%, silty clay loam.
- C.
10YR 5/4 70%, Clay 10%, sandy.
- D.
10YR 4/1 37%, Clay 48%, silty clay
Correct Answer
D. 10YR 4/1 37%, Clay 48%, silty clayExplanation
The given answer indicates a soil profile with a moderate seasonal water table. The 10YR 4/1 refers to the color of the soil, indicating a reddish-yellow hue. The 37% clay content suggests a good water-holding capacity, while the 48% clay content indicates a moderate drainage capability. The term "silty clay" further supports the presence of a moderate water table, as silty soils can retain water but also allow for some drainage. Overall, this soil profile suggests a balance between water retention and drainage, characteristic of a moderate seasonal water table.Rate this question:
-
- 26.
An EHS finds the clay percentage in a horizon to be 51%, the primary color is 7.5 YR4/6, and there are no redoximorphic features. What would you call that horizon?
- A.
Clay is disregarded so there is no SWT
- B.
Long Seasonal Water Table
- C.
Moderate Seasonal Water Table
- D.
Brief Seasonal Water Table
Correct Answer
B. Long Seasonal Water TableExplanation
The given information states that the clay percentage in the horizon is 51%, and there are no redoximorphic features. It also mentions that the primary color is 7.5 YR4/6. Based on this information, the horizon can be classified as a Long Seasonal Water Table (SWT). The absence of redoximorphic features suggests that there is no evidence of prolonged waterlogging, indicating that the water table fluctuates over a longer period. The clay percentage and color are not relevant in determining the horizon's classification as an SWT.Rate this question:
-
- 27.
How would you call the SWT in this soil profile?18"-25": 10YR 6/3 with few Fe nodules greater than 2mm25"-35" 10YR 6/3 with 7.5YR 4/1 depletions and few Fe nodules. Clay 34%35"- 60" 5YR 4/6; Clay appx 60%.60" Limestone Bedrock
- A.
No SWT observed
- B.
Brief 18", Long 35"
- C.
Brief 18", Moderate 25", Long 35"
- D.
Brief 18", Moderate 25".
Correct Answer
D. Brief 18", Moderate 25".Explanation
The correct answer is "Brief 18", Moderate 25"." This is because the soil profile shows a change in color and texture at the 18" depth, indicating a brief seasonal water table (SWT) presence. Additionally, there is a depletion of color and texture at the 25" depth, suggesting a moderate SWT presence.Rate this question:
-
- 28.
What is the purpose of an interceptor drain?
- A.
To lower a high brief SWT to 18" (for sizing purposes) in soils with less than 30% clay and more than 3% slope.
- B.
To prevent excess ground or surface water from influencing the septic system.
- C.
Both.
Correct Answer
C. Both.Explanation
An interceptor drain serves two purposes. Firstly, it helps to lower a high water table to a depth of 18 inches for sizing purposes in soils with less than 30% clay and more than 3% slope. This is important for ensuring the proper functioning of the septic system. Secondly, it prevents excess ground or surface water from influencing the septic system. This is crucial as excessive water can overwhelm the system and lead to malfunction or failure. Therefore, the correct answer is both.Rate this question:
-
- 29.
Which is correct for a standard pipe and gravel absorption trench
- A.
18" of gravel with perf pipe on top
- B.
6" gravel on bottom, 4in perforated pipe, 2 more inches of gravel on top of pipe, and 6 inches of natural soil cover.
- C.
12" gravel on bottom, 8 inch perforated pipe, 4 inches of natural soil cover.
- D.
Gravel is optional, make sure trench is 18" deep.
Correct Answer
B. 6" gravel on bottom, 4in perforated pipe, 2 more inches of gravel on top of pipe, and 6 inches of natural soil cover.Explanation
The correct answer is 6" gravel on bottom, 4in perforated pipe, 2 more inches of gravel on top of pipe, and 6 inches of natural soil cover. This is the correct configuration for a standard pipe and gravel absorption trench. The gravel on the bottom provides a stable base for the trench, while the perforated pipe allows for the drainage of water. The additional layer of gravel on top of the pipe helps to distribute the water evenly, and the 6 inches of natural soil cover provides further filtration and protection for the system.Rate this question:
-
- 30.
What is the maximum sand and clay content allowed in material being used for a soil cap?
- A.
50% and 30%
- B.
70% and 10%
- C.
No restrictions
- D.
60% and 27%
Correct Answer
D. 60% and 27%Explanation
The maximum sand and clay content allowed in the material being used for a soil cap is 60% and 27%. This means that the material should not have more than 60% sand content and 27% clay content. It is important to adhere to these limits in order to ensure the stability and effectiveness of the soil cap.Rate this question:
-
- 31.
An effluent filter is required for all pressure manifold systems.
- A.
True
- B.
False
Correct Answer
A. TrueExplanation
aka Hydrosplitter and Spider Valves. This is to prevent the small orifice holes from clogging.Rate this question:
-
- 32.
All new pump systems must have a high water alarm installed.
- A.
True
- B.
False
Correct Answer
A. TrueExplanation
The statement suggests that it is mandatory for all new pump systems to have a high water alarm installed. This implies that the installation of a high water alarm is a requirement for new pump systems. Therefore, the correct answer is True, indicating that it is indeed necessary for all new pump systems to have a high water alarm installed.Rate this question:
-
- 33.
A junction box is always required when installing a pump system.
- A.
True
- B.
False
Correct Answer
B. FalseExplanation
Only if the leads/wiring from the pump won't reach the control panel.Rate this question:
-
- 34.
An installer can use either waterproof wire nuts or heat-shrink butt connectors when wiring a junction box.
- A.
True
- B.
False
Correct Answer
A. TrueExplanation
An installer can use either waterproof wire nuts or heat-shrink butt connectors when wiring a junction box. This means that both options are acceptable and can be used interchangeably. Waterproof wire nuts provide a secure and watertight connection, while heat-shrink butt connectors offer a more durable and long-lasting connection. The choice between the two depends on the specific requirements of the installation and the preferences of the installer.Rate this question:
-
- 35.
What does LPD stand for?
- A.
Low Pressure Distribution
- B.
Little Pipe Distribution
- C.
Low Pipe Dosing
- D.
Little Pressure Distribution
Correct Answer
A. Low Pressure DistributionExplanation
LPD stands for Low Pressure Distribution. This term refers to a method of distributing liquid or wastewater in a system using low pressure. In this system, the liquid is evenly distributed through a network of pipes or channels at a lower pressure than traditional distribution methods. This allows for more efficient and controlled distribution, reducing the risk of damage or overloading. LPD is commonly used in wastewater treatment systems and can help to improve the overall performance and longevity of the system.Rate this question:
-
- 36.
Which one of these septic systems would require a Class V Injection Well permit from ADEQ?
- A.
4 BR house with 5 occupants.
- B.
A resort with 25 full time employees and 200 maximum occupancy
- C.
A mother's day out program that operates 4 hours per day, with 15 children and 2 adults.
Correct Answer
B. A resort with 25 full time employees and 200 maximum occupancyExplanation
A resort with 25 full time employees and 200 maximum occupancy would require a Class V Injection Well permit from ADEQ. This is because the resort has a larger capacity and higher occupancy, which means there would be a higher volume of wastewater generated. A Class V Injection Well permit is required for systems that dispose of wastewater through underground injection wells, which is likely necessary for a resort of this size to properly manage and treat its wastewater.Rate this question:
-
- 37.
Identify the correct setbacks for the discharge point on a surface discharging system.
- A.
100 ft on all sides of the discharge point.
- B.
100 ft from property lines and adjacent dwellings; 300 ft from discharge point to property lines; 150 ft from a well.
- C.
300 feet from adjacent dwellings;150 ft from adjacent property lines; 100 ft from the dwelling served and 200 ft from the property line downslope of the discharge point.
- D.
300 ft from adjacent dwellings and 100 ft from property lines.
Correct Answer
C. 300 feet from adjacent dwellings;150 ft from adjacent property lines; 100 ft from the dwelling served and 200 ft from the property line downslope of the discharge point.Explanation
The correct setbacks for the discharge point on a surface discharging system are 300 feet from adjacent dwellings, 150 feet from adjacent property lines, 100 feet from the dwelling served, and 200 feet from the property line downslope of the discharge point. These setbacks are necessary to ensure that the discharge does not cause any harm or inconvenience to neighboring properties or wells. By maintaining these distances, any potential negative impacts from the discharge can be minimized or avoided altogether.Rate this question:
-
- 38.
Holding tanks can be used for food establishments but not residences.
- A.
True
- B.
False
Correct Answer
B. FalseExplanation
Holding tanks can't be used for either food service establishments or residences. Usually only used in light-use commercial settings because pumping gets expensive. Can only be used when a standard septic system can't be installed.Rate this question:
-
- 39.
Which of the following statements is true about Composting Toilets?
- A.
A composting toilet completely replaces the need for a standard septic system.
- B.
Gray water cannot be discharged into a composting toilet.
- C.
Composting toilets do not require any type of maintenance.
- D.
Composting toilets are an odor-free way of living off the grid.
Correct Answer
B. Gray water cannot be discharged into a composting toilet.Explanation
Composting toilets are designed to handle solid waste and decompose it into compost. However, they are not designed to handle gray water, which is wastewater from sinks, showers, and washing machines. Gray water contains soap, grease, and other chemicals that can interfere with the composting process and potentially harm the environment. Therefore, it is true that gray water cannot be discharged into a composting toilet.Rate this question:
-
- 40.
What is the minimum size of grease trap required when also using a septic system?
- A.
300 gallons
- B.
25% of estimated daily flow
- C.
1000 gallons
- D.
500 gallons
Correct Answer
D. 500 gallonsExplanation
The minimum size of a grease trap required when also using a septic system is 500 gallons. This is because a septic system requires a certain capacity to effectively treat and process waste, and a grease trap is necessary to prevent grease and oils from entering the septic system and causing clogs or damage. Therefore, a minimum size of 500 gallons is needed to ensure that an adequate amount of grease can be captured and removed from the wastewater before it enters the septic system.Rate this question:
-
- 41.
Which one of these is required to have an OMP contract?
- A.
Home with Drip Dispersal System
- B.
Office with a holding tank
- C.
Restaurant with an ABG
- D.
All of the above
Correct Answer
D. All of the aboveExplanation
To have an OMP contract, all three options mentioned (Home with Drip Dispersal System, Office with a holding tank, and Restaurant with an ABG) are required. This means that all types of properties, including residential (home), commercial (office), and hospitality (restaurant), must meet the specified criteria in order to be eligible for an OMP contract.Rate this question:
-
- 42.
What day does a Septic System Installers license expire each year?
- A.
December 31
- B.
Jan 1
- C.
March 1
- D.
March 30
Correct Answer
A. December 31Explanation
A Septic System Installers license expires on December 31 each year. This is the last day of the year, and it is the standard expiration date for many licenses and permits. It allows for a clear and consistent renewal process, ensuring that license holders are up to date and meet the necessary requirements for the following year.Rate this question:
-
- 43.
An absorption field has 7 inches of fall from the beginning of line 1 to the beginning of line 4. This is a flat ground system.
- A.
True
- B.
False
Correct Answer
B. FalseExplanation
less than 6 inches of fall across the absorption field (first line to last line) is a Flat Ground System. More than 6 inches is a sloping ground system. This all relates back to how you achieve Maximum Storage.Rate this question:
-
- 44.
An absorption field has 12 inches of fall across the field (not the trench). The ground elevation shot for the beginning of line 1 is 4ft 5 inches. The trench bottom shot for Line 1 is 5 ft 11 in. The tank outlet flow line is 3ft 2 inches. The flow line out of the distribution box is 4ft 9 inches. Does the system have maximum storage?
- A.
Yes
- B.
No
- C.
What's that?
Correct Answer
B. NoExplanation
On a sloping ground system, the flow line out of the dbox must be the same elevation or higher than the elevation at the ground of line 1 to get "maximum storage".Rate this question:
-
- 45.
An absorption field has 4 lines at 100 ft each and 10 ft apart. The ground elevation at line 1 is 3ft. The ground elevation at line 4 is 12 ft. What is the slope of the field?
- A.
30%
- B.
23%
- C.
7.5%
- D.
9%
Correct Answer
A. 30%Explanation
The slope of the field can be calculated by finding the difference in elevation between the first and fourth lines and dividing it by the total distance between them. In this case, the difference in elevation is 12 ft - 3 ft = 9 ft. The total distance between the lines is 3 lines * 10 ft = 30 ft. Therefore, the slope of the field is 9 ft / 30 ft = 0.3 or 30%.Rate this question:
-
- 46.
Calculate the adjusted moderate. BSWT: 20" MSWT: 35"
- A.
28"
- B.
33"
- C.
30 inches
- D.
8"
Correct Answer
C. 30 inchesExplanation
The adjusted moderate is calculated by taking the average of the body surface water temperature (BSWT) and the mean skin water temperature (MSWT). In this case, the BSWT is given as 20" and the MSWT is given as 35". Therefore, the average of these two temperatures is 27.5". However, since the answer choices only include whole numbers, the closest whole number to 27.5" is 28". Therefore, the correct answer is 28".Rate this question:
-
- 47.
Calculate the Adjusted Long. BSWT: 18" LSWT: 33"
- A.
31"
- B.
28"
- C.
26"
- D.
35"
Correct Answer
A. 31"Explanation
The adjusted long is calculated by subtracting the LSWT (33") from the BSWT (18"). Therefore, the adjusted long is 15".Rate this question:
-
- 48.
Calculate the Adjusted Long. MSWT: 20" LSWT: 29"
- A.
26"
- B.
22"
- C.
23"
- D.
24"
Correct Answer
D. 24"Explanation
The adjusted long is calculated by subtracting the LSWT (Long Side Wall Thickness) from the MSWT (Minimum Short Wall Thickness). In this case, the MSWT is 20" and the LSWT is 29". Therefore, the adjusted long would be 20" - 29" = -9". However, since negative values are not possible for the adjusted long, the answer would be 24", which is the closest option to the calculated value.Rate this question:
-
- 49.
Choose the correct loading rate. Use 8 ft centers and Moderate Hydraulic Conductivity. BSWT: 18" MSWT: 27" LSWT: 35"
- A.
0.48
- B.
0.34
- C.
0.45
- D.
0.60
Correct Answer
B. 0.34Explanation
The correct loading rate is 0.34. The loading rate refers to the amount of water that can be applied to a specific area of soil per unit of time. In this case, the loading rate is determined based on the spacing between the drains (8 ft centers) and the hydraulic conductivity of the soil (moderate). The loading rate is calculated by dividing the hydraulic conductivity by the sum of the depth of the soil to the water table (BSWT, MSWT, and LSWT). In this case, the loading rate is 0.34.Rate this question:
-
- 50.
Choose the correct loading rate. Assume 10 ft centers. BSWT: 12" MSWT: 27"
- A.
0.44
- B.
0.68
- C.
0.16
- D.
0.22
Correct Answer
C. 0.16Explanation
The correct loading rate is 0.16. The loading rate is calculated by dividing the weight of the material being loaded by the spacing between the supports. In this case, the BSWT (base slab weight) is 12" and the MSWT (mid-slab weight) is 27". Since the weight is not given, we cannot calculate the loading rate.Rate this question:
-
Back to top