OSSF INSTALLER 1 EXAM FINAL PAPER 2025/2026
QUESTIONS AND ANSWERS GRADED A++
✔✔Water table aquifers are recharged by - ✔✔Local percolation
✔✔Sepage pits - ✔✔
✔✔sepage pits - ✔✔Rock-filled or lined pits dug at least 4 feet deep at the end of a
septic tank absorption field system are called
✔✔Cess pools - ✔✔Pits constructed in permeable soil with open-jointed material along
the sides to the bottom of the pit that receive a direct discharge of raw wastewater are
called
✔✔How are waterborne diseases transmitted? - ✔✔Microorganisms (pathogens) that
live in the intestine are passed in the feces and get into the water supply
✔✔What are the three primary routes of contamination for pathogenic microorganisms
and harmful chemicals from on-site sewage systems to our environment? -
✔✔Neighborhood pollution
Groundwater contamination
Surface water pollution
✔✔What problems are a result of neighborhood pollution? - ✔✔Diseases that can be
spread by direct or indirect contact with the standing wastewater.
Vectors, such as roaches and flies, that can also spread diseases after coming in
contact with the wastewater.
Unsightly and unpleasant living conditions that result from the standing wastewater and
odors.
Feuds and bad relationships between neighbors that can result from the wastewater
problems.
Property values drop and real estate transactions fall through. No one benefits and
everyone suffers when neighborhoods are fouled by wastewater.
✔✔Why is acceptable quality water vital? - ✔✔No resource in Texas or elsewhere is
more valuable than water. Acceptable quality water is not only vital in sustaining human
life, but is also vital in sustaining the natural environment and the economic life of
Texas.
✔✔Ground water that is obtained via a well can be used for - ✔✔Drinking, industrial, or
agricultural
QUESTIONS AND ANSWERS GRADED A++
✔✔Water table aquifers are recharged by - ✔✔Local percolation
✔✔Sepage pits - ✔✔
✔✔sepage pits - ✔✔Rock-filled or lined pits dug at least 4 feet deep at the end of a
septic tank absorption field system are called
✔✔Cess pools - ✔✔Pits constructed in permeable soil with open-jointed material along
the sides to the bottom of the pit that receive a direct discharge of raw wastewater are
called
✔✔How are waterborne diseases transmitted? - ✔✔Microorganisms (pathogens) that
live in the intestine are passed in the feces and get into the water supply
✔✔What are the three primary routes of contamination for pathogenic microorganisms
and harmful chemicals from on-site sewage systems to our environment? -
✔✔Neighborhood pollution
Groundwater contamination
Surface water pollution
✔✔What problems are a result of neighborhood pollution? - ✔✔Diseases that can be
spread by direct or indirect contact with the standing wastewater.
Vectors, such as roaches and flies, that can also spread diseases after coming in
contact with the wastewater.
Unsightly and unpleasant living conditions that result from the standing wastewater and
odors.
Feuds and bad relationships between neighbors that can result from the wastewater
problems.
Property values drop and real estate transactions fall through. No one benefits and
everyone suffers when neighborhoods are fouled by wastewater.
✔✔Why is acceptable quality water vital? - ✔✔No resource in Texas or elsewhere is
more valuable than water. Acceptable quality water is not only vital in sustaining human
life, but is also vital in sustaining the natural environment and the economic life of
Texas.
✔✔Ground water that is obtained via a well can be used for - ✔✔Drinking, industrial, or
agricultural
