1|Page
OSSF INSTALLER 1 LICENSE EXAM 2026/2027
ACTUAL COMPLETE REAL VERIFIED EXAM
QUESTIONS AND CORRECT ANSWERS| ACCURATE
REAL EXAM WITH FREQUENTLY TESTED
QUESTIONS AND RATIONALE|ALREADY GRADED A+
/ NEWEST EXAM!!
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 waste water are called
__________________. - Answer-CESSPOOLS.
How are water born diseases transmitted? - Answer-
MICROORGANISMS
What are 3 primary routes of containment for pathogenetic
microorganisms and harmful chemicals from on-site
sewage systems to our environment? - Answer-
Neighborhood pollution, groundwater pollution and surface
water pollution.
What problems are a result of neighborhood pollution? -
Answer-~Diseases that can be spread by direct or indirect
contact with the standing water.
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~Vectors such as roaches and flies, that can also spread
diseases after coming in contact with the waste water.
~Unsightly and unpleasant living conditions that result
from the standing waste water.
~Feuds and bad relationships with neighbors that can
result from waste water problems.
~Property values drop and real estate transactions fall
through. No one benefits and everyone suffers when
neighborhoods are fouled by waste water.
Why is acceptable quality water vital? - Answer-Sustains
human life, the natural environment and the economic life
of Texas
Groundwater that is obtained via a well can be used for
what purpose? - Answer-Agricultural,
industrial/commercial and drinking water.
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What is the difference between a water table aquifer and
an artesian aquifer? - Answer-Water table aquifer is in
direct contact with either the soil or the intermediate belt.
Artesian is overplayed by a layer of impervious material.
What is the static water level? - Answer-Level at which
water stands in a well.
What are the 2 categories of sources of pollutants in
surface water? - Answer-Point source pollution.
Non-point source pollution.
What is the difference between point source and nonpoint
source pollution? - Answer-Point source can be controlled,
non point source has little or no control.
In the hydrologic cycle, water moves by evaporation and
transpiration into the ___________________ where it
comes in contact with cooler air, condenses, and falls to
the ground in the form of _____________________ (sleet,
snow, hail or rain), and the surface water supply through
OSSF INSTALLER 1 LICENSE EXAM 2026/2027
ACTUAL COMPLETE REAL VERIFIED EXAM
QUESTIONS AND CORRECT ANSWERS| ACCURATE
REAL EXAM WITH FREQUENTLY TESTED
QUESTIONS AND RATIONALE|ALREADY GRADED A+
/ NEWEST EXAM!!
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 waste water are called
__________________. - Answer-CESSPOOLS.
How are water born diseases transmitted? - Answer-
MICROORGANISMS
What are 3 primary routes of containment for pathogenetic
microorganisms and harmful chemicals from on-site
sewage systems to our environment? - Answer-
Neighborhood pollution, groundwater pollution and surface
water pollution.
What problems are a result of neighborhood pollution? -
Answer-~Diseases that can be spread by direct or indirect
contact with the standing water.
,2|Page
~Vectors such as roaches and flies, that can also spread
diseases after coming in contact with the waste water.
~Unsightly and unpleasant living conditions that result
from the standing waste water.
~Feuds and bad relationships with neighbors that can
result from waste water problems.
~Property values drop and real estate transactions fall
through. No one benefits and everyone suffers when
neighborhoods are fouled by waste water.
Why is acceptable quality water vital? - Answer-Sustains
human life, the natural environment and the economic life
of Texas
Groundwater that is obtained via a well can be used for
what purpose? - Answer-Agricultural,
industrial/commercial and drinking water.
, 3|Page
What is the difference between a water table aquifer and
an artesian aquifer? - Answer-Water table aquifer is in
direct contact with either the soil or the intermediate belt.
Artesian is overplayed by a layer of impervious material.
What is the static water level? - Answer-Level at which
water stands in a well.
What are the 2 categories of sources of pollutants in
surface water? - Answer-Point source pollution.
Non-point source pollution.
What is the difference between point source and nonpoint
source pollution? - Answer-Point source can be controlled,
non point source has little or no control.
In the hydrologic cycle, water moves by evaporation and
transpiration into the ___________________ where it
comes in contact with cooler air, condenses, and falls to
the ground in the form of _____________________ (sleet,
snow, hail or rain), and the surface water supply through
