On-Site Sewage Facilities (OSSF) – Installer I Practice Exam

These questions are part of the practice quiz. Start practicing

• What characterizes a recharge feature within the Edwards Aquifer Recharge Zone?
• Which of the following actions comes last in the OSSF permitting process?
• In relation to soil treatment, what is the effect of low flow rate?
• What should be avoided to prevent an OSSF system failure?
• What is the definition of a well according to Texas water regulations?
• How does an OSSF system differ from a city wastewater collection system?
• What does the term "designated representative" refer to?
• What is a common reason for soil absorption system failure?
• What microorganisms are commonly found in wastewater?
• How far in advance must Texas One Call be notified before digging with mechanical equipment?
• What is the conversion factor from gallons per minute to gallons per day?
• What is the specific yield range for clay soils?
• Should an installer inform homeowners about the maintenance of their OSSF?
• When should a lined Evapotranspiration field be used?
• What is the role of a site evaluator?
• What is the maximum distance between the scum and sludge layer for a septic tank to be pumped?
• For suitable construction, how far must one be away from a restrictive horizon?
• When minimum lot size cannot be met, who must design the system?
• According to TCEQ guidelines, how often should septic tanks be cleaned?
• Can artesian wells be contaminated from bore holes?
• What does the reserve capacity in a tank refer to?
• Which type of disposal system is not considered standard?
• What is required for a Designated Representative to start working?
• What does maintenance of an OSSF typically exclude?
• What is the typical range for total suspended solids in wastewater?
• What is the minimum excavation width required for any excavation length?
• What is porosity in soil?
• What is the minimum elevation difference required for the house sewer?
• When is it necessary to install a riser in OSSF?
• How many rows of perforations does an 8-10 inch gravel less pipe have?
• What is the required minimum distance from an on-site sewage facility to an easement?
• What does soil texture refer to?
• Which types of septic systems require planning by a Professional Engineer?
• What is the maximum amount of sewage that an on-site sewage disposal system is designed to handle?
• Which factors influence the survival of bacteria in the soil?
• What materials are acceptable for septic tanks?
• What is required to be a Maintenance Provider?
• Which of the following pipe specifications is required for standard drainfields?
• Which regulatory body oversees the OSSF guidelines?
• What is the acceptance rate for Class 3 soil?
• At what locations should level checks be performed during installation?
• What type of On-Site Sewage Facility (OSSF) is recommended for use in clay soil?
• Specific yield is defined as what?
• What is a serious threat when an on-site sewage facility system fails in an urban area?
• What is the requirement for the bottom of a drainfield excavation?
• What are the three key properties used to characterize soil?
• How is the size of a pumped effluent drainfield calculated?
• Which of the following is NOT a major component of soil?
• What is the minimum lot size required for OSSF if a private water supply is used?
• Which of the following is a type of penalty for violating OSSF regulations?
• What type of soil is suitable for backfill in an ET system?
• Which component of soil significantly affects its texture?
• What does wastewater loading equal to?
• What is the total nitrogen limit in typical wastewater composition?
• Which type of irrigation system is most efficient in areas of high groundwater?
• What is a pumped effluent drainfield (PED)?
• What can damage the integrity of the septic system over time?
• Which of the following is NOT a major step in the permitting process of OSSF?
• What is the minimum distance required from the distribution field to building foundations?
• For a 10-inch gravel less pit pipe, how is length calculated?
• What happens to dissolved oxygen (DO) levels when temperature increases?
• How does the flow elevation change in a gravity system as you move away from the stub out?
• Which of the following pipe types is allowed in drainfields?
• When should changes to an OSSF be presented for approval?
• Sand soils typically have a porosity range of?
• In the drainfield formula A(ft2), what does 'Q' represent?
• Where should additional cleanouts be located in a sewage system?
• What is the requirement for the bottom of excavation for a standard drainfield?
• What does a lower numerical value indicate when using a Philadelphia rod?
• What is the minimum depth of liquid required in a tank?
• What slope percentage is deemed unsuitable for drainfield installation?
• What is meant by groundwater?
• What is the excavation length for a 2-foot wide excavation with a sewage flow of 100 gallons per day for Class 1b?
• How does nitrogen removal occur in wastewater systems?
• What must a leaching chamber be in terms of construction?
• What defines a certified professional soil scientist?
• To convert cubic feet to cubic yards, what operation should be performed?
• How do you convert gallons to cubic feet?
• How many gallons can a small leak from a toilet use in a day?
• What is the minimum required fill above the pipe in a standard drainfield installation?
• What is the capacity formula for four-sided objects?
• What is the formula for calculating slope?
• What is the formula for the length of a leaching chamber drainfield without a water-saving device?
• What is the required distance from an on-site sewage facility to a public or private water line?
• What characterizes the middle layer of a soil profile?
• When was the Health and Safety Code, Chapter 366 last updated?
• What is the minimum capacity of the first tank in a three-tank system?
• What information is primarily evaluated before allowing installation of an OSSF?
• What is an important consideration when designing gravity flow septic systems?
• What is the purpose of geotextile fabric in drainfield systems?
• What is an important feature of an Evapotranspiration bed?
• How important is education on OSSF maintenance for homeowners, according to installers?
• Permeability is best defined as?
• Which property of soil refers to its ability to hold and exchange cations?
• Which of the following is NOT an effective way to alert traffic about construction?
• In septic system design, what is a secondary treatment method?
• In what scenario should new plans for an OSSF be drawn?
• What are bacteria that can cause diseases known as?
• What is the primary benefit of proper traffic regulation around work areas?
• Who has the authority to approve changes to an On-Site Sewage Facility (OSSF) system?
• Which type of pipe system can be utilized in an ET system?
• What is the minimum drop in elevation required from the outlet of the tank to the absorption area?
• What material is gravel less pipe made of?
• What does it mean to alter a septic system?
• Which materials can the sewer line from the house be made of?
• What term describes soil that is mainly unweathered bedrock?
• What does specific retention measure in soil?
• Which of the following best describes a pumped effluent drainfield?
• What type of drainfield uses a combination of soil and constructed elements?
• Non-uniform grains are associated with which type of porosity?
• How is the size of a drainfield calculated in square feet?
• What are the four major components of soil?
• Which statement regarding uniform grains is true?
• Which class represents the long term soil acceptance rate of greater than 0.5 gallons per absorptive area per day?
• What characterizes a gravel-less drainfield pipe?
• What is a diversion or control valve used for in an ET system?
• What is the term for a solid that can be filtered from wastewater?
• According to the National Electric Code, how should electrical wires be installed?
• Under what condition are dual pumps required in a system?
• What specific yield range is associated with gravel soils?
• How is surface grade defined?
• What is the minimum depth required for the installation of a drainfield?
• What is a typical composition for total solids in wastewater?
• Which factor is NOT considered in the calculation of drainfield area?
• What is the definition of infiltration in soil science?
• What is the authorization to construct in relation to septic systems?
• What characterizes a standard absorptive drainfield?
• What type of porosity does fractured rock have?
• What percentage of gravel in soil is acceptable for drainfield if gravel is greater than 2mm?
• What is the largest particle size in soil classification?
• What is the purpose of the 'Notice of approval' in the OSSF process?
• Who is considered an authorized agent in the context of septic system regulation?
• What is the max allowable slope for a Type A OSSF structure?
• What characterizes a leaching chamber drainfield?
• Which soil types are prohibited as backfill in drainfield installations?
• How far must an on-site sewage facility be from streams and ponds?
• What does an Evapotranspiration Drainfield do?
• How should installers view the management of disposal systems?
• System loading needs to be equal to or less than what?
• What does aerobic treatment in septic systems involve?
• What type of soil is considered unsuitable for drainfield use?
• What is one potential reason for a failed on-site sewage facility (OSSF) system?
• What does the top layer of the soil profile consist of?
• Class 1a soil is characterized as?
• What is found in the bottom layer of a soil profile?
• Can an Installer I construct a conventional system with a septic tank as pretreatment?
• What do rescue operations in confined spaces often require?
• What is the required size for PED lines?
• For an excavation size of 5x6, what would be the resultant drainfield size?
• What is the role of a maintenance provider in relation to on-site sewage facilities?
• How is a 100-year floodplain defined?
• What must extend at least one foot beyond the drainline horizontally in an ET system?
• What is the classification of soil that is described as coarse loam?
• How is a civil penalty categorized under OSSF regulations?
• Gravity flow septic systems require how many inches of drop from outlet to disposal field?
• What percentage slope is generally unsuitable for OSSF?
• When should an unlined Evapotranspiration field be used?
• What term describes the ability of soil to transmit water effectively?
• What flow rate defines a Class 4 soil acceptance rate?
• How is reserve capacity calculated?
• What happens to dissolved oxygen (DO) levels when temperature decreases?
• What is considered the most critical soil characteristic for an on-site sewage facility?
• Can a professional engineer perform site evaluations without a Site Evaluator license?
• What are some key secondary criteria for selecting an OSSF?
• What is the main consequence of improper sewage disposal?
• Where should geotextile fabric be installed in a drainfield?
• What is the significance of a soil scientist in OSSF projects?
• Which statement correctly describes the desired flow from the house sewer to the septic tank?
• What is the minimum pipe diameter from the house to the tank?
• What is a characteristic of a low-pressure dosing system?
• What does physical straining refer to in soil treatment?
• How does an Evapotranspiration system primarily operate?
• What is a benefit of using water savers in a three-bedroom house?
• How is minimum liquid capacity (V) calculated for systems under 500 gallons?
• What is a requirement to take the Installer 2 class?
• What is required for an individual to act as a professional engineer in Texas?
• What types of systems can an Installer I construct and repair?
• Which professional is NOT a requirement to be a Site Evaluator?
• In a well-operating system, where are most scum and solids removed from?
• What is the consequence of improper separation distances in OSSF?
• Which type of soil is characterized as fine loam or sandy clay?
• What does Biochemical Oxygen Demand (BOD) measure?
• When did the license for Installer 2 and Designated Representative go into effect?
• What is the primary criterion for selecting an on-site sewage facility?
• What is critical for maintaining the functionality of an OSSF system?
• What is the minimum distance required between an on-site sewage facility and a public water well?
• What method can be used to measure topography?
• What is one of the most common symptoms of a failing OSSF system?
• What guidelines exist for water saving devices with ET systems?
• Where does most of the wastewater treatment occur in an on-site sewage facility?
• Which component of soil contributes to the soil's ability to hold water?
• What is the minimum slope required for the sewer line from the house?
• What is a significant danger of confined space rescues?
• What is the particle size range for silt in soil classification?
• What is the legal requirement to contact Texas One Call before digging?
• What defines a soil horizon?
• Can evidence of groundwater be present within 2 feet of excavation?
• What is the minimum length requirement for pipes in a drainfield?
• How is the length of a leaching chamber affected when using a water-saving device?
• What does the presence of total dissolved solids (TDS) indicate in wastewater?
• What is the minimum horsepower required for a pump in a PED?
• What does the formula A(ft2) = 1.6Q/RET calculate?
• How often should septic tanks generally be inspected?
• What is not included in a standard disposal system?
• What is the minimum requirement of installs for an Installer 1 before taking Installer 2?
• What license is needed to take the Installer 2 class?
• Which entities fall under the term "local governmental entity"?
• Does a Designated Representative need experience in the field?
• What is the typical pH range for wastewater?
• To convert cubic yards to gallons, what operation should be performed?
• What is the standard size of a drainfield based on excavation dimensions?
• Are bore holes, injection wells, or cesspools legal?
• Which of the following is NOT considered a pathogen?
• What is the composition of Class 1b soil?
• Which of the following is NOT a chemical property of soil?
• How frequently must an OSSF installer renew their registration?
• How is a malfunctioning OSSF defined?
• Which document is essential for ensuring safety compliance before excavation?
• Is it acceptable to dispose of excessive grease in a septic tank?
• As of which date is Title 30, TAC Chapter 285 regarding On-Site Sewage Facilities effective?
• What formula is used to calculate the capacity in circular objects?
• What term is used to describe the volume of liquid that extends up to the outlet line?
• Where should water softener backflow be discharged?
• What do we call a solid that cannot be filtered from wastewater?
• What scientific measurement is used to gauge the strength of wastewater?
• Which of the following is the correct formula to calculate the area of a drainfield?
• What is the most significant advantage of using aerobic bacteria in sewage treatment?
• What are the requirements to be a Site Evaluator?
• What is meant by evaporation in the context of water cycle?
• Can a septic tank be classified as a pretreatment system?
• Which of the following is NOT a type of infection risk mentioned?
• What is the ideal topography for an On-Site Sewage Facility?
• What is meant by dissolved oxygen (DO)?
• What is the maximum depth allowed for a standard drainfield installation?
• Which of the following is NOT a jobsite safety check?
• What is an essential step right after submitting for a permit in the OSSF process?
• What is transpiration?
• In the context of OSSF, what does the abbreviation 'Ra' refer to?
• How is the drop in inches of a pipe calculated if the grade is known?
• Which types of soil are considered unsuitable for On-Site Sewage Facilities (OSSF)?
• What type of activities does a maintenance company perform related to OSSFs?
• How high above the tank operating level should the inflow line be?
• What does the term "malfunctioning OSSF" imply?
• Which layer of the soil profile has the highest content of weathered material?
• What is the freeze line depth commonly found in Texas?
• How much separation is required between trenches of a standard drainfield installation?
• What types of soil can be used for the installation of a leaching chamber?
• Which term describes the ease at which liquid can move through soil?
• Which type of bacteria is NOT typically found in activated sludge?
• Why is a preconstruction site evaluation important?
• What is a maximum single line length for perforated pipe in a drainfield?
• What is the primary purpose of the ET system's drainfield?
• Why should fittings be made of stainless steel in sewage systems?
• Where should On-Site Sewage Facilities not be located in terms of topographical features?
• How far away from the sidewall or bottom of excavation must there not be unsuitable soil?
• What type of flood hazard is acceptable for a drainfield?
• What type of criminal offenses is generally associated with OSSF violations?
• What happens when an OSSF system is overloaded with water?
• What is the maximum slope allowed for a trench during excavation?
• What slope is considered excessive for a single-level sewage system?
• What can mottles indicate about soil?
• Should waste materials that are not typical for septic systems be introduced into an OSSF?
• What does the angle of repose refer to in relation to soil?
• What should a lot design and installation evaluation include?
• Which aspect does NOT typically factor into the evaluation of OSSF sites?
• What is a critical consideration during the site assessment for an OSSF installation?
• What is one of the safety concerns when channeling traffic through a work area?
• What is the required strength of pipes used in drainfields?
• What is the primary composition of sewage?
• When does adsorption occur in relation to water?
• What is the typical porosity range for clay soils?
• Where should the entry point for the final outlet be located?
• What should be included in a site evaluation for OSSF installation?
• When is the effective date for the Occupational Licenses and Registrations related to OSSF?
• Which modeling is important when assessing soil suitability for sewage facilities?
• Who is recognized as a professional sanitarian?
• Which type of soil angle indicates stability in construction?
• What is primarily the responsibility of a professional sanitarian?
• How much water does a typical three-bedroom house use per day?
• What is a key feature of sewage as it relates to its origin?
• What is the purpose of providing a cleanout in a sewage system?