CSD 315 ACTUAL EXAM PAPER 2026
QUESTIONS WITH SOLUTIONS GRADED A+
▶ The county ____________________ is an essential tool for conducting a
site evaluation but does not take the place of the on-site field soil
evaluation.. Answer: soil survey
▶ Sites with greater than ____ percent slope are unsuitable.. Answer: 30
▶ A minimum lot size of _______ acre is required for subdivisions serviced
by _________ water. The minimum size is ______ acre for those serviced
by ___________.. Answer: 0.5, public, 1, private well
▶ Soil evaluation pits shall be excavated to a depth of _____ inches below
the proposed _________ or to a _________ horizon, whichever is
shallower.. Answer: 24, drainfield, restrictive
▶ Any soil profile with an indication of high-water table within _____ inches
below the proposed drainfield shall be considered _____________ for a
standard drainfield.. Answer: 24, unsuitable
▶ The ___________ and ____________ of each soil horizon should be
measured from ________ to _________ and recorded in the soil evaluation
report.. Answer: sequence, depth, top, bottom
▶ The depth of soil classified as suitable with respect to texture shall be at
least ____ inches below the bottom of the proposed excavation for a
standard drainfield.. Answer: 24
▶ If a soil with no gravel will not form a ribbon in the texture-by-feel
method, it is classified as ______ or ______, class ____.. Answer: sand or
loamy sand, Ib
▶ If a soil forms a ribbon greater than 2 inches, and neither smooth or gritty
consistency predominates, the soil is _______, class _____.. Answer: clay,
IV
, ▶ Soil suitability factors include: _________, ________, and _________..
Answer: soil texture, soil depth, and restrictive horizon
▶ Overall site suitability factors include ________, ________,
___________, and ____________.. Answer: site factor, soil factors,
groundwater evaluation, and surface drainage analysis
▶ A common reason for wastewater system failure is __________..
Answer: hydraulic overloading (due to modernized tank usually)
▶ The value Q is. Answer: Quantity of Sewage (GPD)
▶ Some malfunctioning OSSF can be made to function properly with
minimal cost by implementing ______________.. Answer: water
conservation measures.
▶ In estimating water usage for a single-family dwelling, the number of
_________ in the home is a key indicator; however, _________ should
also be considered.. Answer: bedrooms, square footage
▶ List four water saving plumbing devices that can be used in a home..
Answer: low flow toilets, low flow shower head, low flow faucets, pressure
reducing valves
▶ Identify four water-saving habits homeowners should adopt. Answer:
don't leave water running, full laundry and dishwasher loads,
reduce/eliminate use of garbage disposals, not using toilet for trash
disposal
▶ Two wastewater tests commonly used to measure the strength of
sewage are the ________ test and the ________ test.. Answer: BOD, TSS
▶ The minimum water usage rate that should be used for planning an
OSSF for a new home with three bedrooms and 3000 square feet of interior
living area is _______ gallons/day.. Answer: 300
▶ Blockage in the home plumbing system is often caused by _______,
________, and _________.. Answer: oils, greases, and fats
QUESTIONS WITH SOLUTIONS GRADED A+
▶ The county ____________________ is an essential tool for conducting a
site evaluation but does not take the place of the on-site field soil
evaluation.. Answer: soil survey
▶ Sites with greater than ____ percent slope are unsuitable.. Answer: 30
▶ A minimum lot size of _______ acre is required for subdivisions serviced
by _________ water. The minimum size is ______ acre for those serviced
by ___________.. Answer: 0.5, public, 1, private well
▶ Soil evaluation pits shall be excavated to a depth of _____ inches below
the proposed _________ or to a _________ horizon, whichever is
shallower.. Answer: 24, drainfield, restrictive
▶ Any soil profile with an indication of high-water table within _____ inches
below the proposed drainfield shall be considered _____________ for a
standard drainfield.. Answer: 24, unsuitable
▶ The ___________ and ____________ of each soil horizon should be
measured from ________ to _________ and recorded in the soil evaluation
report.. Answer: sequence, depth, top, bottom
▶ The depth of soil classified as suitable with respect to texture shall be at
least ____ inches below the bottom of the proposed excavation for a
standard drainfield.. Answer: 24
▶ If a soil with no gravel will not form a ribbon in the texture-by-feel
method, it is classified as ______ or ______, class ____.. Answer: sand or
loamy sand, Ib
▶ If a soil forms a ribbon greater than 2 inches, and neither smooth or gritty
consistency predominates, the soil is _______, class _____.. Answer: clay,
IV
, ▶ Soil suitability factors include: _________, ________, and _________..
Answer: soil texture, soil depth, and restrictive horizon
▶ Overall site suitability factors include ________, ________,
___________, and ____________.. Answer: site factor, soil factors,
groundwater evaluation, and surface drainage analysis
▶ A common reason for wastewater system failure is __________..
Answer: hydraulic overloading (due to modernized tank usually)
▶ The value Q is. Answer: Quantity of Sewage (GPD)
▶ Some malfunctioning OSSF can be made to function properly with
minimal cost by implementing ______________.. Answer: water
conservation measures.
▶ In estimating water usage for a single-family dwelling, the number of
_________ in the home is a key indicator; however, _________ should
also be considered.. Answer: bedrooms, square footage
▶ List four water saving plumbing devices that can be used in a home..
Answer: low flow toilets, low flow shower head, low flow faucets, pressure
reducing valves
▶ Identify four water-saving habits homeowners should adopt. Answer:
don't leave water running, full laundry and dishwasher loads,
reduce/eliminate use of garbage disposals, not using toilet for trash
disposal
▶ Two wastewater tests commonly used to measure the strength of
sewage are the ________ test and the ________ test.. Answer: BOD, TSS
▶ The minimum water usage rate that should be used for planning an
OSSF for a new home with three bedrooms and 3000 square feet of interior
living area is _______ gallons/day.. Answer: 300
▶ Blockage in the home plumbing system is often caused by _______,
________, and _________.. Answer: oils, greases, and fats
