Commercial Contractor exam questions
with answers
Commercial Contractors Certification - CORRECT
ANSWERS ✔✔is required to install any on-site sewage
management system with a design flow greater than
2000 gallons per day
Commercial tanks can be made of - CORRECT ANSWERS
✔✔concrete, plastic, fiberglass, or such other materials
Larger septic tanks - CORRECT ANSWERS ✔✔may have to
be constructed on-site
Septic tanks are sized for - CORRECT ANSWERS ✔✔the
daily 24 hour peak flow volume
Septic tanks may be - CORRECT ANSWERS ✔✔trained
together
The volume of the first compartment must be at least -
CORRECT ANSWERS ✔✔two-thirds the volume of the 24
hour flow
,The minimum size septic tank must be - CORRECT
ANSWERS ✔✔1000 gallons
Garbage grinders require the septic tank to be increased
by - CORRECT ANSWERS ✔✔fifty percent (50%)
All tanks shall be equipped with tees that are - CORRECT
ANSWERS ✔✔four-inch (4") PVC, ASTM 3034 rated or
equivalent
Tees shall be located at the - CORRECT ANSWERS ✔✔inlet
and outlet ends of the tank
Tees shall be constructed so that they extend - CORRECT
ANSWERS ✔✔a minimum of 25% and a maximum of 50%
of the total liquid depth
The invert of the outlet tee shall be located - CORRECT
ANSWERS ✔✔two inches (2") below the invert of the inlet
tee
Outlet tees shall be equipped with - CORRECT ANSWERS
✔✔an effluent filter
, The effluent filter on the outlet tee shall be designed to
handle BOTH - CORRECT ANSWERS ✔✔the daily flow
volume and wastewater characteristics
All tanks shall be constructed - CORRECT ANSWERS ✔✔so
the length is at least one and one half (1 1/2) times the
width
All tanks shall have - CORRECT ANSWERS ✔✔two (2)
compartments
Tank compartment partitions shall not be located no less
than - CORRECT ANSWERS ✔✔two-thirds (2/3) or more
than three-fourths (3/4) the length of the tank from the
inlet end
Compartment partitions will be constructed - CORRECT
ANSWERS ✔✔with a pass-thru hole or slot
Pass-thru hole or slots shall be constructed so that it is -
CORRECT ANSWERS ✔✔equal to or grater than the
diameter of the inlet pipe and is positioned below the
liquid surface of a minimum of 25% to a maximum of
50% total liquid depth
with answers
Commercial Contractors Certification - CORRECT
ANSWERS ✔✔is required to install any on-site sewage
management system with a design flow greater than
2000 gallons per day
Commercial tanks can be made of - CORRECT ANSWERS
✔✔concrete, plastic, fiberglass, or such other materials
Larger septic tanks - CORRECT ANSWERS ✔✔may have to
be constructed on-site
Septic tanks are sized for - CORRECT ANSWERS ✔✔the
daily 24 hour peak flow volume
Septic tanks may be - CORRECT ANSWERS ✔✔trained
together
The volume of the first compartment must be at least -
CORRECT ANSWERS ✔✔two-thirds the volume of the 24
hour flow
,The minimum size septic tank must be - CORRECT
ANSWERS ✔✔1000 gallons
Garbage grinders require the septic tank to be increased
by - CORRECT ANSWERS ✔✔fifty percent (50%)
All tanks shall be equipped with tees that are - CORRECT
ANSWERS ✔✔four-inch (4") PVC, ASTM 3034 rated or
equivalent
Tees shall be located at the - CORRECT ANSWERS ✔✔inlet
and outlet ends of the tank
Tees shall be constructed so that they extend - CORRECT
ANSWERS ✔✔a minimum of 25% and a maximum of 50%
of the total liquid depth
The invert of the outlet tee shall be located - CORRECT
ANSWERS ✔✔two inches (2") below the invert of the inlet
tee
Outlet tees shall be equipped with - CORRECT ANSWERS
✔✔an effluent filter
, The effluent filter on the outlet tee shall be designed to
handle BOTH - CORRECT ANSWERS ✔✔the daily flow
volume and wastewater characteristics
All tanks shall be constructed - CORRECT ANSWERS ✔✔so
the length is at least one and one half (1 1/2) times the
width
All tanks shall have - CORRECT ANSWERS ✔✔two (2)
compartments
Tank compartment partitions shall not be located no less
than - CORRECT ANSWERS ✔✔two-thirds (2/3) or more
than three-fourths (3/4) the length of the tank from the
inlet end
Compartment partitions will be constructed - CORRECT
ANSWERS ✔✔with a pass-thru hole or slot
Pass-thru hole or slots shall be constructed so that it is -
CORRECT ANSWERS ✔✔equal to or grater than the
diameter of the inlet pipe and is positioned below the
liquid surface of a minimum of 25% to a maximum of
50% total liquid depth
