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OSSF INSTALLER 1 LICENSE ACTUAL EXAM NEWEST
2025 ACTUAL EXAM COMPLETE 200 QUESTIONS AND
CORRECT DETAILED ANSWERS (VERIFIED
ANSWERS) |ALREADY GRADED A+|BRAND NEW!!
What types of criminal offenses are related to OSSF - ANSWER-misdemeanor in accordance with Chap 7 Texas Water Code and Chapter 12.23 of Texas Penal Code
Max allowable slope for less than 20 ft - ANSWER-Stable Rock (Vertical)90*
Type A (3/4:1) 53*
Type B (1:1) 45*
Type C (1.5:1) 34*
What is not an effective way to warn traffic about construction - ANSWER-Anything that doesn't catch attention, like construction equipment. Must have movement by a person or flashing lights
What are 4 safety concerns when channeling traffic thru a work area - ANSWER-pre warn, sign properly, regulate speed, guide properly 1 / 4
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What is the angle of repose - ANSWER-an angle closest to perpendicular at which the soil remains at rest
how far ahead must someone call Texas One Call before digging with mechanical equipment - ANSWER-2 working days excluding weekend and holiday
Three types of infection risk - ANSWER-hep A, leptospirosis and parasites
Dangers of confined space rescues - ANSWER-Almost 60% of fatalities involved would be rescuers
Cubic feet to Cubic Yards - ANSWER-divide by 27
Gallons to Cubic Feet - ANSWER-divide by 7.48
Gallons per minute to Gallons per day - ANSWER-multiple by 1,440
Cubic Yards to Gallons - ANSWER-multiple by 202 2 / 4
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Capacity formula 4 sided objects - ANSWER-L x W x H x 7.48 gallon/ft cubed
Capacity in circular objects - ANSWER-Pi x R squared x 7.48 gallon/ft cubed
Liquid working capacity - ANSWER-volume up to outlet line
What are bacteria that can cause disease called - ANSWER- pathogens
Microorganisms in wastewater include - ANSWER-bacteria, viruses, protozoa and melminths
What is a solid that can be filtered from waste called - ANSWER-TOS total suspended solids
What is a solid that cannot be filtered from wastewater called - ANSWER-TDS total dissolved solids
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What is Biochemical Oxygen Demand (BOD) - ANSWER- measure strength of wastewater in regard to organic loading
What is dissolved oxygen (DO) - 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
What pH is typical for wastewater - ANSWER-6.5-8.0
How does nitrogen removal take place? - ANSWER-by vegetative uptake and denitrification in slow rate systems
Anaerobic bacteria is NOT found in - ANSWER-activated sludge
What is physical straining in relation to soil treatment - ANSWER-bacteria are larger than soil pore opening, increased efficiency
What is flow rate in relation to soil treatment - ANSWER-low flow has better efficiency of virus removal
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