OSSF INSTALLER 2 EXAM (UPDATED 2026)
QUESTIONS & ANSWERS | LATEST ALREADY
GRADED A+ UPDATE |2026
Lots served by individual wells should be a minimum of ________acre in
size for a septic tank system
one acre
Lots served by a public water supply should be a minimum of _______
acre in size for installation of a septic tank system
one - half
When minimum lot size cannot be met , an on site system must be
designed by a _______ or a _________
Pro engineer or a Pro Sanitarian
When evaluating a topography site _________and potential for
________are key considerations
Slope floodind
A major reason for wastewater system failure is
a homeowner waste
b . inadequate planning
c . hydraulic overloading
d . oils grease and fats
c . hydraulic overloading grease
The size of OSSF systems are normally based upon the
a . lot size
b . soil profile
c . hydraulic loading
d . homeowner's preference
, c . hydraulic loading
Some malfunctioning OSSF systems can be made to function properly with
minimal cost by implementing
Water
The first step in reducing the wastewater load is
Elimination of leaks
List four water - saving plumbing devices that can be used in a home
Reduce flow shower head
Faucet aerators
Reduce flow faucet
Pressure reducinh valves
Identify four water saving living habits homeowners should adopt
Waiting for full loads before running clothes or dishwashers
Not using the toilet to dispose of trash such a cigarette butts tissue paper
or sanitary napkins
Not leaving the faucet running when shaving or brushing teeth
Reducing or eliminating the use of garbage disposals
The value of Q
Quantity of sewage (gallons/day)
Two wastewater tests commonly used to measure the strength of sewage
are the _______ and the _____
BOD and the SS
Blockage in the home plumbing system is often caused by _______,
_______ and _______
Oils fats and grease
It is recommended that ____________not be used because they
significantly increase the amount of suspended solids and organic matter
discharged into the sewage disposal system
QUESTIONS & ANSWERS | LATEST ALREADY
GRADED A+ UPDATE |2026
Lots served by individual wells should be a minimum of ________acre in
size for a septic tank system
one acre
Lots served by a public water supply should be a minimum of _______
acre in size for installation of a septic tank system
one - half
When minimum lot size cannot be met , an on site system must be
designed by a _______ or a _________
Pro engineer or a Pro Sanitarian
When evaluating a topography site _________and potential for
________are key considerations
Slope floodind
A major reason for wastewater system failure is
a homeowner waste
b . inadequate planning
c . hydraulic overloading
d . oils grease and fats
c . hydraulic overloading grease
The size of OSSF systems are normally based upon the
a . lot size
b . soil profile
c . hydraulic loading
d . homeowner's preference
, c . hydraulic loading
Some malfunctioning OSSF systems can be made to function properly with
minimal cost by implementing
Water
The first step in reducing the wastewater load is
Elimination of leaks
List four water - saving plumbing devices that can be used in a home
Reduce flow shower head
Faucet aerators
Reduce flow faucet
Pressure reducinh valves
Identify four water saving living habits homeowners should adopt
Waiting for full loads before running clothes or dishwashers
Not using the toilet to dispose of trash such a cigarette butts tissue paper
or sanitary napkins
Not leaving the faucet running when shaving or brushing teeth
Reducing or eliminating the use of garbage disposals
The value of Q
Quantity of sewage (gallons/day)
Two wastewater tests commonly used to measure the strength of sewage
are the _______ and the _____
BOD and the SS
Blockage in the home plumbing system is often caused by _______,
_______ and _______
Oils fats and grease
It is recommended that ____________not be used because they
significantly increase the amount of suspended solids and organic matter
discharged into the sewage disposal system
