LARE Grading and Stormwater
Management Exam Questions and
Answers16
What should be the depth of a stormwater management pond? - ANSWERS -4' (mitigate
elevated water temperatures)
Detention Pond - ANSWERS -temporarily stores water after a storm but eventually empties out
to a downstream water body. Reduces peak runoff and lengthens the duration of peak flow.
Cross Slope for a Sidewalk - ANSWERS -1-2%
General Construction Sequence - ANSWERS -
Average End Area Method and when to use it - ANSWERS -Used Calculate Cut and Fill
Soil Boring - ANSWERS -the process of drilling a hole in the ground to collect samples of soil and
bedrock. Performed prior to installing structural components.
A site protection plan (site preparation plan/ erosion control plan) could include - ANSWERS -
Stockpiling areas, construction parking, trees to be protected.
The line on a grading plan where grades return to existing grades is called a... - ANSWERS -No
cut/no fill line
3 Main benefits of green roofs... - ANSWERS -Increase biodiversity, Reduce stormwater runoff,
reduce solar heat gain
,concave - ANSWERS -a slope where the contour lines are spaced at increasing distances
downhill (closer at the top) flatter at the bottom
convex - ANSWERS -a slope where the contour lines are spaced at decreasing distances downhill
(closer at the bottom) steeper at the bottom
where are landings required on a ramp? - ANSWERS -top and bottom of ramp and every 30" of
rise min. (30' at 1:12)
max slope of ramp - ANSWERS -1:12 or 8.33% or 4.8 degrees
A cut and fill calculation method that can also be used to calculate volume in water bodies is -
ANSWERS -contour area
angle of repose - ANSWERS -steepest a slope can be without failing (33-37 degrees)
subgrade - ANSWERS -top layer below the final surface treatment
finished grade - ANSWERS -elevation after all construction is completed
trick to remember crown direction (of a road) - ANSWERS -crown points down
Infiltration - ANSWERS -the process by which water on the ground surface enters the soil
(ultimately the groundwater system)
When are handrails needed? - ANSWERS -Anything equal to or greater than 5%, per ADA
guidelines
, What is a well-graded aggregate? - ANSWERS -A mixture of particle sizes in the soil (distribution
in the soil) better stability
Greenroof layers - order from top to bottom - ANSWERS -1 - growing medium
2- filter fabric
3- drainage and retention
4- Insulation
5 - Root barrier
6 - waterproofing
What is the best erosion control technique for a drop inlet in a dirt
drainage ditch? - ANSWERS -Silt Fence
What is TMDL? - ANSWERS -Total maximum daily load (a measurement of the maximum
pollutant a water body can receive per day) to meet state standard.
100 year floodplain means - ANSWERS -there is a chance that a flood of that magnitude will
occur is 1 in 100 in any given year
Liquefaction - ANSWERS -The process by which an earthquake's violent movement suddenly
turns loose soil into liquid mud
Heaving - ANSWERS -when soil pushes upward
differential subsidence - ANSWERS -a type of ground movement where different parts of a
building move at different rates
Management Exam Questions and
Answers16
What should be the depth of a stormwater management pond? - ANSWERS -4' (mitigate
elevated water temperatures)
Detention Pond - ANSWERS -temporarily stores water after a storm but eventually empties out
to a downstream water body. Reduces peak runoff and lengthens the duration of peak flow.
Cross Slope for a Sidewalk - ANSWERS -1-2%
General Construction Sequence - ANSWERS -
Average End Area Method and when to use it - ANSWERS -Used Calculate Cut and Fill
Soil Boring - ANSWERS -the process of drilling a hole in the ground to collect samples of soil and
bedrock. Performed prior to installing structural components.
A site protection plan (site preparation plan/ erosion control plan) could include - ANSWERS -
Stockpiling areas, construction parking, trees to be protected.
The line on a grading plan where grades return to existing grades is called a... - ANSWERS -No
cut/no fill line
3 Main benefits of green roofs... - ANSWERS -Increase biodiversity, Reduce stormwater runoff,
reduce solar heat gain
,concave - ANSWERS -a slope where the contour lines are spaced at increasing distances
downhill (closer at the top) flatter at the bottom
convex - ANSWERS -a slope where the contour lines are spaced at decreasing distances downhill
(closer at the bottom) steeper at the bottom
where are landings required on a ramp? - ANSWERS -top and bottom of ramp and every 30" of
rise min. (30' at 1:12)
max slope of ramp - ANSWERS -1:12 or 8.33% or 4.8 degrees
A cut and fill calculation method that can also be used to calculate volume in water bodies is -
ANSWERS -contour area
angle of repose - ANSWERS -steepest a slope can be without failing (33-37 degrees)
subgrade - ANSWERS -top layer below the final surface treatment
finished grade - ANSWERS -elevation after all construction is completed
trick to remember crown direction (of a road) - ANSWERS -crown points down
Infiltration - ANSWERS -the process by which water on the ground surface enters the soil
(ultimately the groundwater system)
When are handrails needed? - ANSWERS -Anything equal to or greater than 5%, per ADA
guidelines
, What is a well-graded aggregate? - ANSWERS -A mixture of particle sizes in the soil (distribution
in the soil) better stability
Greenroof layers - order from top to bottom - ANSWERS -1 - growing medium
2- filter fabric
3- drainage and retention
4- Insulation
5 - Root barrier
6 - waterproofing
What is the best erosion control technique for a drop inlet in a dirt
drainage ditch? - ANSWERS -Silt Fence
What is TMDL? - ANSWERS -Total maximum daily load (a measurement of the maximum
pollutant a water body can receive per day) to meet state standard.
100 year floodplain means - ANSWERS -there is a chance that a flood of that magnitude will
occur is 1 in 100 in any given year
Liquefaction - ANSWERS -The process by which an earthquake's violent movement suddenly
turns loose soil into liquid mud
Heaving - ANSWERS -when soil pushes upward
differential subsidence - ANSWERS -a type of ground movement where different parts of a
building move at different rates
