Download ALL OSSF PACKAGED CERTIFICATION SCRIPT 2026 QUESTIONS WITH SOLUTIONS GRADED A+ and more Exams Economics of Education in PDF only on Docsity!
ALL OSSF PACKAGED CERTIFICATIONALL OSSF PACKAGED CERTIFICATION
SCRIPT 2026 QUESTIONS WITHSCRIPT 2026 QUESTIONS WITH
SOLUTIONS GRADED A+SOLUTIONS GRADED A+
- Site Evaluator. Answer: Individual who visits a site and conducts soil evaluations and a site survey - Surface application is often selected over other OSSF disposal options because of. Answer: clay soils and/or seasonal groundwater problems - Which of the following describes domestic wastewater as it leaves a home?. Answer: fresh, light in color, has dissolved oxygen - A gravelless pipe drainfield. Answer: can be backfilled with Class Ib, II, or III soil - Installer II & Maintenance Provider. Answer: OSSF licenses that require previous experience - T/F: Septic tanks may be reinforced fiberglass. Answer: T - T/F: The tank must be level. Answer: T - Suspended solid. Answer: A solid that can be filtered out of the wastewater - If a soil with no gravel will not form a ribbon in the texture-by-feel method, it is classified as ______ or ______, class ____.. Answer: sand or loamy sand, Ib - List each of the major soil horizons. Answer: surface soil A, surface soil B, and parent material
- The bacteria are larger than the pore openings in the soil. Answer: Physical removal of bacteria by straining occurs when - poliomyelitis & infectious hepatitis. Answer: Viruses responsible for such diseases as - Soil evaluation pits shall be excavated to a depth of _____ inches below the proposed _________ or to a _________ horizon, whichever is shallower.. Answer: 24, drainfield, restrictive - TCEQ. Answer: Adopted the current OSSF Rules in 1997 & revised them several times - Air/water. Answer: Interconnected pores in the soil profile allow ___ & ___ to enter the soil at its surface and migrate downward - Equipment & procedures to protect work site. Answer: Cones barricades high level flags, pre-warn, sign properly, regulate speed, guide properly - Square Yards. Answer: Square feet divided by 9 - A maintenance provider for a surface application OSSF using a proprietary aerobic plant must have an employee who is. Answer: a licensed maintenance provider or a registered maintenance technician - Miles. Answer: Feet divided by 5, - Pathogens. Answer: microorganisms that cause disease - Fecal Coliform. Answer: Type of bacteria indicates sewage contamination
- The minimum distance between standard drainfield excavations is. Answer: 3 feet - Acre. Answer: Square yards divided by 4, - Which of the following is true if porous media in a standard drainfield?. Answer: It should be uniform in size, it should be 0.75 inch to 2 inches in size, it should be clean and resistant to breakdown - Nitrogen or nitrate removal in soil occurs by _________.. Answer: vegetation uptake - Vegetation uptake. Answer: Nitrogen or nitrate removal in soil occurs by - Gallons. Answer: Cubic yards X 202 - A standard perforated drainline should be which of the following?. Answer: 3 inches to 4 inches in diameter, a maximum length of 150 feet, laid parallel in multiple-line system - Microorganisms in wastewater include __________.. Answer: bacteria, viruses, protozoa and helminths. - Soil profiles, vegetation, relief, & drainage. Answer: Soil associations are soil units which encompass broad areas with similar patterns of - Which of the following produces the highest quality effluent?. Answer: city sewage treatment plant - Square feet. Answer: Acre X 43, - The most commonly use primary treatment component in Texas for on-site systems is the. Answer: septic tank
- What is the purpose of requiring an affidavit to be filed with the county real property records for a surface application system?. Answer: to notify future property owners of the type of OSSF used and the maintenance requirements - Grease interceptors are needed. Answer: on wastewater lines from commercial kitchens - Feet. Answer: Inches divided by 12 - Cubic Yards. Answer: Cubic feet divided by 27 - Cubic feet. Answer: Cubic yards X 27 - Infectious diseases. Answer: Domestic wastewater contains microorganisms that are capable of causing - The liquid depth of a septic tank. Answer: must be at least 30 inches - Which of the following is true of standard intermittent sand filter?. Answer: provides secondary wastewater treatment, has a maximum surface loading rate of 1.2 gal/day/sqft, requires at least 24 inches of filter media which meets definite specifications (ASTM C-33) - Designated Representative. Answer: An official inspector of a new OSSF - Square Feet. Answer: Square Yards X 9 - Gallons. Answer: Cubic feet X 7. - T/F: One single-compartment septic tank that is sized properly is allowed..
- Which of the following should a house sewer have?. Answer: A two way sanitary clean-out, minimum 1/8 inch per foot fall, minimum diameter of 3 inches - USDA soil textural triangle. Answer: A tool to graphically delineate soil textural classes - A mound or soil substitution drainfield is often used. Answer: when existing soils will not provide adequate treatment due to depth or texture - T/F: A 12-inch port (minimum) must be provided in the top of the tank. Answer: T - Installer II. Answer: Who can legally install a septic tank followed by a low pressure dosing drain field at a rental house - Which of the following considerations should receive the greatest emphasis in selecting a type of OSSF disposal option?. Answer: soil and site conditions - Mottling. Answer: A soil color pattern of orange and brown on a background of gray or bluish color - Systems that routinely require a pump tank include. Answer: surface and drip irrigation and sand filters - T/F: Tees are allowed for inlet and outlet devices. Answer: T - Which of the following is a way to evaluate an aerobic treatment plant for excessive solids and need for wasting?. Answer: 30-minute settling test - The minimum water usage rate that should be used for planning an OSSF for a new home with three bedrooms and 3000 square feet of interior living
area is _______ gallons/day.. Answer: 300
- T/F: A leakage from the tank or joints of 1.6 gallons/hour is permissible. Answer: F - A trench requires 430 cubic feet of gravel. How many cubic yards must be purchased?. Answer: 16 cubic yards - A septic tank serving a new five-bedroom home with 3800 sqft must have a minimum capacity of. Answer: 1,250 gallons - New OSSF licenses are issued for a term of ______. An individual must complete _______ of TCEQ-approved continuing education courses in order to renew license.. Answer: 3 years, 24 hours - Designated Representative. Answer: These Individuals working in any capacity for an OSSF authorized agent cannot work as an installer, Designer for a fee, or private Site Evaluator within jurisdiction of the permitting authority - Infectious waterborne diseases. Answer: A particular hazard that OSSF installers face that most construction workers do not experience - Would a treatment plant capable of handling 1500 gallons per day of wastewater with BOD as high as 280 mg/L be capable of handling wastewater from the above washateria? What is the organic loading capacity of this treatment plant?. Answer: 3.50 lbs/day - A solid that can be filtered out of the wastewater is a _________.. Answer: suspended solid - 9 steps of permitting process.
- The expected volume of wastewater (Q) in gal/day from an older (pre-1990) three-bedroom mobile home would be. Answer: 300 - The primary treatment device providing the least or poorest treatment of domestic wastewater would be _______.. Answer: septic tank - In estimating water usage for a single-family dwelling, the number of _________ in the home is a key indicator; however, _________ should also be considered.. Answer: bedrooms, square footage - What is needed to pre-qualify for an exam?. Answer: submitting an application and notarized experience statements, paying class and application fees, and successfully completing the appropriate training course - Cubic feet. Answer: Gallons divided by 7. - An important part of the installation of an LPD system is. Answer: checking and adjusting pressure on lines - What must be known to determine the size of spray area required for an OSSF spray irrigation system?. Answer: Rate of irrigation (Ri) allowed in that area and (Q) in gal/day - A common reason for wastewater system failure is __________.. Answer: hydraulic overloading (due to modernized tank usually) - Septic tank. Answer: Primary treatment device providing the least or poorest treatment of domestic wastewater would be - 3 year term. Answer: New OSSF licenses are issued for
- Sandy loam & loam. Answer: Class II Soils include USDA classes of - List the equipment and procedures to protect a work site.. Answer: signs, regulated speed, cones, barricade, high level flags - Individuals working as a __________ or in any capacity for an OSSF ___________ cannot work as an Installer, Designer for a fee, or private Site Evaluator within the jurisdiction of the permitting authority.. Answer: Designated representative (DR), permitting authority - Bacteria, viruses, protozoa, helminths. Answer: Microorganisms in wastewater - The depth of soil classified as suitable with respect to texture shall be at least ____ inches below the bottom of the proposed excavation for a standard drainfield.. Answer: 24 - Nitrate. Answer: An inorganic chemical which affects human health - what is the purpose of the inlet baffle or T?. Answer: Reduce velocity and disperse flow, vent the tank to the building plumbing - The _______ is responsible for reviewing permit applications, site evaluations, planning materials, and conducting inspections of OSSFs. Answer: DR (designated representative) - Microorganisms that cause disease are called _________.. Answer: pathogens - Moisture, temperature, pH, & organic matter. Answer: The factors influencing the survival of bacteria in soil are - Agriculture, human life, economic viability in an area. Answer: Water resources are vital because water is necessary for
Answer: poliomyelitis and infectious hepatitis
- 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.. Answer: 6.67 cubic yards - The minimum distances a watertight sewage treatment tank should be from a water-well and a property line are. Answer: 50 feet and 5 feet respectively - When a maintenance contract is required for a single-family residence OSSF, the minimum frequency of site visits and type of testing is. Answer: once every four months with chlorine residual or fecal coliform testing - A minimum lot size of _______ acre is required for subdivisions serviced by _________ water. The minimum size is ______ acre for those serviced by ___________.. Answer: 0.5, public, 1, private well - The standard drainfield depth in East and Central Texas is limited to. Answer: 18 inches minimum and 36 inches maximum - _______ and ________ soil textural classes are always unsuitable for standard absorptive OSSF. Answer: class IA and IV - What is the surface area (area in square feet) of an evapotranspiration system 40 feet wide and 65 feet long?. Answer: 2,600 sqft - _____________ is a term describing the ability of water to migrate through a soil profile under either _________ or __________ conditions.. Answer: Hydraulic conductivity, saturated, unsaturated - Properly sealed septic tanks are. Answer: vented through the building plumbing
- An individual who visits a site and conducts soil evaluations and a site survey is a(n) __________.. Answer: site evaulator - Figure the area of a lot that measures 60ft by 280ft. Answer: 16,800sqft ,0.39 acres - A disposal option that might be considered in a clay soil would be a ________.. Answer: drip or spray irrigation - Physical removal of bacteria by straining occurs when _______.. Answer: the bacteria are larger than the pore openings in the soil - Required samples for testing from a surface application system are collected from. Answer: the pump tank effluent line port - The purpose of the geotextile fabric over gravel is to. Answer: prevent backfill from entering porous media - A soil color pattern of orange and brown on a background of gray or bluish color is called. Answer: mottling - Drip irrigation systems are most sensitive to which type of contaminant?. Answer: suspended solids - List the 9 steps of the permitting process. Answer: 1) Site Evaluations 2) Selection of an OSSF 3) System must be planned 4) Professional designer (PE or RS) submits planning materials 5) Permit application and planning materials must be prepared and submitted 6) The application and planning materials are reviewed by permitting authority 7) Authorization or permit to construct (ATC) must be granted by permitting authority BEFORE construction can begin 8) Construction begins after ATC recieved. 9) System must be inspected by permitting agency. 10) Notice of approval (NOA) and permit or license to operate will
purchased (find the volume of a rectangular object)?. Answer: 208.3 cubic yards
- Domestic wastewater contains microorganisms that are capable of causing _________.. Answer: infectious diseases - Overall site suitability factors include ________, ________, ___________, and ____________.. Answer: site factor, soil factors, groundwater evaluation, and surface drainage analysis - The ___________ and ____________ of each soil horizon should be measured from ________ to _________ and recorded in the soil evaluation report.. Answer: sequence, depth, top, bottom - Several samples were taken from a small washateria with seven new water-conserving machines and sent to a lab for BOD analysis. The average BOD was 406 mg/L. What would be the minimum expected BOD (organic) loading in lbs./day?. Answer: 4.74 lbs/day - The value Q is. Answer: Quantity of Sewage (GPD) - Which of the following characteristics should a poured-in-place concrete septic tanks have?. Answer: watertight, designed by PE, Structurally sound - Of what materials may a septic tank be constructed?. Answer: steel reinforced concrete - List the two unsuitable types of soil structure or structural condition.. Answer: Platy (like a stack of plates) Massive ( can't break it up, huge pieces) - A leaching chamber system.
Answer: requires 25% less absorptive area than a standard system for new construction
- Which if the following is acceptable for the line from the building to the treatment tank?. Answer: cast iron, SDR 26 plastic pipe, and Schedule 40 plastic pipe - List the OSSF licenses that require previous experience. Answer: installer II, Site evaluator (SE), and Maintenance Provider (MP) - Who can legally install a septic tank followed by a low-pressure dosing drain field at a rental house?. Answer: Installer II - The setback from a public water well for an aerobic plant is. Answer: 50 feet - Identify four water-saving habits homeowners should adopt. Answer: don't leave water running, full laundry and dishwasher loads, reduce/eliminate use of garbage disposals, not using toilet for trash disposal - T/F: A minimum 4-inch-thick sand, sandy loam, clay loam, or pea gravel pad is required under prefabricated tanks. Answer: T - The _________ is a tool to graphically delineate soil textural classes.. Answer: USDA soil textural triangle - T/F: Outlet Tee should extend to the bottom of the tank. Answer: F - If a soil forms a ribbon greater than 2 inches, and neither smooth or gritty consistency predominates, the soil is _______, class _____.. Answer: clay, IV - A drip irrigation system must. Answer: be equipped with mechanisms to flush from the drainfield back to the treatment unit or pump tank
- Soil associations are _______ units which encompass broad areas with similar patterns of __________, __________, __________, and _________.. Answer: soil. soil profiles, vegetation, relief, and drainage - What are the minimum soil requirements for leaching chambers or gravelless pipe systems following a septic tank?. Answer: The same as for a standard absorptive drainfield, 2 feet of well-drained Class Ib, II, or III soil below the field bottom - In an unlined ET system, wastewater is disposed of by which of the following?. Answer: evaporation, transpiration, soil absorption - A pumped effluent drainfield. Answer: is an alternative for well-drained clay soils on nearly level sites, has a 2% or less slope for single-family dwellings only - The standard inlet and outlet devices in a septic tank should be. Answer: tees - It is recommended that _____________ are not used because they significantly increase the amount of suspended solids and organic matter that is discharged to sewage disposal system.. Answer: garbage disposal - The factors influencing the survival of bacteria in soil are _______.. Answer: moisture, temperature, pH, and organic matter. - Sites with greater than ____ percent slope are unsuitable.. Answer: 30 - An inorganic chemical that affects human health is. Answer: nitrate - A particular hazard that OSSF installers face that most construction workers do not is _______.. Answer: infectious waterborne diseases
- Which of the following must be known prior to actually laying out a new OSSF?. Answer: building location, size of the property, soil conditions in the drainfield - A trench measures 30 inches wide. How wide is the trench in feet?. Answer: 2.5' - How many cubic yards of ASTMC-33 sand media must be purchased for an intermittent sand filter treating wastewater from a new four bedroom home (with water-saving devices) in order to meet minimum state requirements?. Answer: 18. - Parasites (helminths) found in untreated sewage include ________.. Answer: hookworm, round worms, and tapeworms - Which of the following is a likely cause of a "rotten egg" odor from an aerobic treatment plant?. Answer: Mechanical aerator failure, hydraulic overload caused by leaking toilet - What is the loading rate of a system with: Q= 550GPD, BOD= 350 mg/L, Ph=8.4, TSS= 400 mg/L. Answer: 1.6 lbs/day - T/F: An inlet line should be at least 3 inches above the liquid level.. Answer: T - List the four components of soil. Answer: air, water, organics, inorganics - To determine the minimum size of aerobic treatment unit needed for a particular home, one must know. Answer: number of bedrooms and square feet in the home and refer to TCEQ Table II - What would be the percent slope on a lot 250 feet deep that drops 20 feet in elevation over the depth of the lot?.
