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OSSF INSTALLER 1 EXAM | ALL QUESTIONS
AND CORRECT ANSWERS (VERIFIED
ANSWERS) | ALREADY GRADED A+ | LATEST
EXAM |
What is infiltration ---------CORRECT ANSWER-----------------the entry of water into soil What is permeability ---------CORRECT ANSWER-----------------the ease at which liquid can move in soil, effected by properties of soil like aggregation of structural units What are the 3 properties to characterize soil ---------CORRECT ANSWER- ----------------texture, drainage/groundwater presence and depth/ restrictive horizon What 2 types of soil are unsuitable ---------CORRECT ANSWER--------------- --Class 1a, sand with > 30% gravel and clay Minimum lot size for OSSF ---------CORRECT ANSWER-----------------1 acre if private water supply 1/2 acre if on city water Ideal topography for OSSF ---------CORRECT ANSWER-----------------nearly level with gentle slope for rainwater runoff
What % slope is unsuitable for OSSF ---------CORRECT ANSWER------------ -----greater than 30% Where should OSSF NOT be located in regards to topography --------- CORRECT ANSWER-----------------in a depression or in a complex slope area dissected by gullies and ravines How can topography be measured ---------CORRECT ANSWER--------------- --GPS, laser, optical instrument What is a solid that can be filtered from waste called ---------CORRECT ANSWER-----------------TOS total suspended solids What is a solid that cannot be filtered from wastewater called --------- CORRECT ANSWER-----------------TDS total dissolved solids What is Biochemical Oxygen Demand (BOD) ---------CORRECT ANSWER- ----------------measure strength of wastewater in regard to organic loading What is dissolved oxygen (DO) ---------CORRECT ANSWER----------------- free oxygen that can become available to waste, is consumed in a short period of time, measure of freshness Temp up, DO down Temp down, DO up
Can a septic tank be considered a pretreatment system ---------CORRECT ANSWER-----------------yes A standard disposal system does NOT include ---------CORRECT ANSWER-----------------gravel less pipes A nonstandard disposal system does NOT include ---------CORRECT ANSWER-----------------drip irrigation What should a site evaluation include ---------CORRECT ANSWER------------ -----soil and geologic conditions, lot size, topography and slope, setbacks /separation distances, flood hazard info Soil from largest to smallest ---------CORRECT ANSWER----------------- gravel (2+mm) sand (.05-2mm) silt (.002-.05mm) clay (less than .002mm) What are the 4 major components of soil ---------CORRECT ANSWER------- ----------organic, air filled, water filled, mineral Soil texture ---------CORRECT ANSWER-----------------the relative proportion of sand, silt and clay in soil Porosity ---------CORRECT ANSWER-----------------the percentage of soil that is occupied by pores or space
Specific yeild ---------CORRECT ANSWER-----------------the amount of water drained from soil by gravity Specific retention ---------CORRECT ANSWER-----------------amount of water remaining after gravity drainage Permeability ---------CORRECT ANSWER-----------------the capacity of a material to transmit water Uniform grains have high porosity ---------CORRECT ANSWER----------------
- true Non uniform grains have low porosity ---------CORRECT ANSWER------------ -----true Fractured rock has what type of porosity ---------CORRECT ANSWER-------- ---------high Clay porosity and specific yield ---------CORRECT ANSWER----------------- 45 - 55% and 1- 10 Gravel porosity and specific yield ---------CORRECT ANSWER----------------- 25 - 40% and 15- 30
Are bore holes, injection wells or cesspools legal? ---------CORRECT ANSWER-----------------no Can artesian wells be contaminated from bore holes? ---------CORRECT ANSWER-----------------yes When did license for Installer 2 and Designated Rep go into effect? --------- CORRECT ANSWER----------------- 1998 Requirements to take Installer 2 class ---------CORRECT ANSWER----------- ------Installer 1 license for 1 yr and 3 installs or 2 yrs as apprentice plus 6 installs Does Designated Representative need experience? ---------CORRECT ANSWER-----------------No, just course and test at 70%, but cannot work as installer/designer/evaluator in jurisdiction Requirements for Site Evaluator ---------CORRECT ANSWER----------------- Current Installer 2, DR, Engineer, Sanitarian, Geoscientist Requirements for Maintenance Provider ---------CORRECT ANSWER-------- ---------Maintenance Tech for 3 years or Installer 2 plus class
What septic systems require planning by Professional Engineer? --------- CORRECT ANSWER-----------------low pressure dosing, absorptive mounds, soil substitution, secondary treatment, anything aerobic What does it mean to alter a septic system? ---------CORRECT ANSWER--- --------------To change an on-site sewage facility Authorization to construct ---------CORRECT ANSWER-----------------first part of the permit Authorized agent ---------CORRECT ANSWER-----------------delegated the authority by the executive director to implement and enforce the rules Certified professional soil scientist ---------CORRECT ANSWER----------------
- individual who has met the certification requirements of the American Society of Agronomy to engage in the practice of soil science Designated representative ---------CORRECT ANSWER-----------------An individual who holds a valid license to review permit applications, site evaluations, or planning materials, or conduct inspections on on-site sewage facilities. Floodplain (100-year) ---------CORRECT ANSWER-----------------has a 1% chance of flooding each year
Professional engineer ---------CORRECT ANSWER-----------------Texas Board of Professional Engineers to engage in the practice of engineering in the State of Texas Professional sanitarian ---------CORRECT ANSWER-----------------individual registered by the Texas Department of State Health Services to carry out educational and inspection duties in the field of sanitation Recharge feature ---------CORRECT ANSWER-----------------Permeable geologic or manmade feature located on the Edwards Aquifer Recharge Zone, hydrologic interconnectedness and rapid infiltration can occur Sewage ---------CORRECT ANSWER-----------------is primarily organic and biodegradable or decomposable, and originates as human, animal, or plant waste Site evaluator ---------CORRECT ANSWER-----------------conducts preconstruction site evaluations, performs soil analysis, a site survey, or other activities necessary to determine the suitability of a site for OSSF Can a professional engineer perform sit evaluation without SE license ------- --CORRECT ANSWER-----------------Yes What is a well ---------CORRECT ANSWER-----------------defined under Texas Water Code, Chapters 26, 32, and 33, and 16 TAC Chapter 76
How often does an install renew their registration ---------CORRECT ANSWER-----------------every 3 years Types of penalties for violating OSSF regulations ---------CORRECT ANSWER-----------------injunction, civil or criminal Health and Safety Code, Chapter 366 ---------CORRECT ANSWER----------- ------Updated February 7, 2017 On-Site Sewage Facilities, Title 30, TAC Chapter 285 ---------CORRECT ANSWER-----------------Effective December 29, 2016 Occupational Licenses and Registrations, Title 30, TAC Chapter 30, Subchapters A and G ---------CORRECT ANSWER-----------------Effective September 29, 2016 Major steps in permitting process ---------CORRECT ANSWER----------------- Site/soil evaluation Select OSSF system System planning Submit for permit Review permit application Authorization to construct issued Construction Inspection Notice of approval
Dangers of confined space rescues ---------CORRECT ANSWER-------------- ---Almost 60% of fatalities involved would be rescuers Cubic feet to Cubic Yards ---------CORRECT ANSWER-----------------divide by 27 Gallons to Cubic Feet ---------CORRECT ANSWER-----------------divide by
Gallons per minute to Gallons per day ---------CORRECT ANSWER----------- ------multiple by 1, Cubic Yards to Gallons ---------CORRECT ANSWER-----------------multiple by 202 Capacity formula 4 sided objects ---------CORRECT ANSWER----------------- L x W x H x 7.48 gallon/ft cubed Capacity in circular objects ---------CORRECT ANSWER-----------------Pi x R squared x 7.48 gallon/ft cubed Liquid working capacity ---------CORRECT ANSWER-----------------volume up to outlet line
What are bacteria that can cause disease called ---------CORRECT ANSWER-----------------pathogens Microorganisms in wastewater include ---------CORRECT ANSWER---------- -------bacteria, viruses, protozoa and melminths Bottom layer of soil profile ---------CORRECT ANSWER----------------- unweathered bedrock What is Class 1a soil ---------CORRECT ANSWER-----------------sandy with 30% or more gravel- unsuitable for drainfield use What is Class 1b soil ---------CORRECT ANSWER-----------------sandy What is class 2 soil ---------CORRECT ANSWER-----------------coarse loam What is class 3 soil ---------CORRECT ANSWER-----------------fine loam, sandy clay What is class 4 soil ---------CORRECT ANSWER-----------------clay- unsuitable for drainfield use
Minimum distance for tank and distribution field ---------CORRECT ANSWER-----------------public water well 50/150 feet public or private water line 10/10 feet streams, ponds, etc 50/75 feet (except LDP is 25ft) foundations 5/5 feet easements 1 foot total slope where seepage may occur 5/25 feet Edwards aquifer 50/150 feet Formula for calculating slope ---------CORRECT ANSWER----------------- difference in elevation over distance multiplied by 100 ex: high point 15 feet, distance 200 feet = 0.75 x 100= 7.5% slope Formula for drop in inches of pipe, if grade is known ---------CORRECT ANSWER-----------------% slope/100 times distance ex drop in inches of 0.33% grade over 150 feet 0.33/100 = .0033ft times 150 ft = 0.495 ft 0.495 ft x 12inches per foot = 5.9 inches What should a lot design and installation evaluation include --------- CORRECT ANSWER-----------------lot size, soil and geologic conditions, topography and slope, setbacks, flood hazards What is a common reason for soil absorption system failure --------- CORRECT ANSWER-----------------lot size too small What is a serious threat when a system fails in urban or suburban area? --- ------CORRECT ANSWER-----------------threat of waterborne disease
When minimum lot size cannot be met, system must be designed by --------
- CORRECT ANSWER-----------------Professional Engineer or Professional Sanitarian What is the most critical soil characteristic ---------CORRECT ANSWER------ -----------the ability to absorb wastewater Where does most of the wastewater treatment occur ---------CORRECT ANSWER-----------------In the soil, not the tank What is the primary criteria for OSSF selection ---------CORRECT ANSWER-----------------it will function properly What are some secondary criteria for selecting an OSSF ---------CORRECT ANSWER-----------------cost, minimal maintenance, simplicity of operation, long term reliability System loading needs to be equal to or less than what ---------CORRECT ANSWER-----------------System Capacity Typical wastewater composition ---------CORRECT ANSWER----------------- Total solids 700-1,000 mg/L Total suspended solids 180-300mg/L Total Nitrogen 40-50mg/L Grease 90-110 mg/L
In a well operating system, where will most of scum and solids be removed from ---------CORRECT ANSWER-----------------first chamber How high above tank operating level should inflow line be? --------- CORRECT ANSWER-----------------At least 3 inches Where should the entry point for final outlet be? ---------CORRECT ANSWER----------------- 25 - 50% of depth below surface Why should fittings be made of stainless steel? ---------CORRECT ANSWER-----------------to resist corrosion from anaerobic environment When do you need to install a riser ---------CORRECT ANSWER--------------- --when depth from surface to tank exceed 12 inches What is minimum depth of liquid in tank? ---------CORRECT ANSWER------- ----------30 inches Gravity flow septic systems need how many inches of drop from outlet to disposal field? ---------CORRECT ANSWER-----------------12 inches What materials can sewer line from house be made of? ---------CORRECT ANSWER-----------------cast iron, high strength pipe or schedule 40 under driveway, can also use SDR 26 elsewhere
Pipe diameter from house to tank must be at least how many inches? ------- --CORRECT ANSWER-----------------At least 3 inches Minimum slope from sewer line from house ---------CORRECT ANSWER---- -------------No less than 1/8 inch per foot or 1% slope Where should additional cleanouts be located? ---------CORRECT ANSWER-----------------within 5 feet of 90* bend and every 100 ft of straight pipe The reserve capacity in a tank is ---------CORRECT ANSWER----------------- the volume above the tank alarm Reserve capacity is equal to ---------CORRECT ANSWER-----------------1/ days flow in gallons When are dual pumps required ---------CORRECT ANSWER----------------- when daily flow is over 1,000 gallons per day How should electrical wires be installed? ---------CORRECT ANSWER------- ----------UL, according to National Electric Code, in approved junction boxes and non metallic grey pipe with visible disconnect
