Stormwater Management Test 1 UPDATED
ACTUAL Questions and CORRECT
Answers
The design overflow point of a depression pond is where? - CORRECT ANSWER - the
lowest point along the perimeter of a depression pond
What is the maximum mowable slope? - CORRECT ANSWER - 33% or 3V:1H
What is the maximum cut slope in clay soils? - CORRECT ANSWER - 2H: 1V or flatter
State the slope formula - CORRECT ANSWER - V=H*G, G=V/H, H=V/G
What is the max fill slope? - CORRECT ANSWER - 3H:1V or flatter
A 5H:1V is equal to what percent? - CORRECT ANSWER - 20%
To how many decimal places should you typically show percent slope on a grading plan? -
CORRECT ANSWER - 2 decimal places
Which tend to erode faster, cut slopes or fill slopes? - CORRECT ANSWER - fill slopes
What is the maximum reasonable design gradient for a parking lot? why? - CORRECT
ANSWER - 5% because of carts and car doors
What is the typical minimum design gradient for an impervious pavement? - CORRECT
ANSWER - 1%
, What is the max allowable slope for a handicap ramp? - CORRECT ANSWER - 8.3%
What is the max allowable slope for a non-ramp handicap access? - CORRECT
ANSWER - 5% (for slopes that don't need handrails)
What is the maximum length of run (in ft.) for a handicap ramp before a landing is required? -
CORRECT ANSWER - 30'
What is the approx. slope across the surface of a small pond? - CORRECT ANSWER -
4H:1V
What is the typical maximum steepness of a slope for a detention pond without a fence? -
CORRECT ANSWER - 4H:1V
A 1:1 slope is the same thing as what percent? - CORRECT ANSWER - 100%
A 1:1 slope is the same thing as what in degrees? - CORRECT ANSWER - 45 degrees
The angle of repose for sand is what degrees? - CORRECT ANSWER - 340 degrees**
In what ways do index contours differ from intermediate contours on a grading plan? -
CORRECT ANSWER - index contours are bolder, thicker, and labels in the center with
long dashes, and intermediate contours are thinner, lighter, and short dashed
A vertical slope (90 degrees) can be expressed as what gradient in percent? - CORRECT
ANSWER - 1:0, infinity
Excavated pond - CORRECT ANSWER - Constructing a pond by digging a pit below the
surrounding ground level.
ACTUAL Questions and CORRECT
Answers
The design overflow point of a depression pond is where? - CORRECT ANSWER - the
lowest point along the perimeter of a depression pond
What is the maximum mowable slope? - CORRECT ANSWER - 33% or 3V:1H
What is the maximum cut slope in clay soils? - CORRECT ANSWER - 2H: 1V or flatter
State the slope formula - CORRECT ANSWER - V=H*G, G=V/H, H=V/G
What is the max fill slope? - CORRECT ANSWER - 3H:1V or flatter
A 5H:1V is equal to what percent? - CORRECT ANSWER - 20%
To how many decimal places should you typically show percent slope on a grading plan? -
CORRECT ANSWER - 2 decimal places
Which tend to erode faster, cut slopes or fill slopes? - CORRECT ANSWER - fill slopes
What is the maximum reasonable design gradient for a parking lot? why? - CORRECT
ANSWER - 5% because of carts and car doors
What is the typical minimum design gradient for an impervious pavement? - CORRECT
ANSWER - 1%
, What is the max allowable slope for a handicap ramp? - CORRECT ANSWER - 8.3%
What is the max allowable slope for a non-ramp handicap access? - CORRECT
ANSWER - 5% (for slopes that don't need handrails)
What is the maximum length of run (in ft.) for a handicap ramp before a landing is required? -
CORRECT ANSWER - 30'
What is the approx. slope across the surface of a small pond? - CORRECT ANSWER -
4H:1V
What is the typical maximum steepness of a slope for a detention pond without a fence? -
CORRECT ANSWER - 4H:1V
A 1:1 slope is the same thing as what percent? - CORRECT ANSWER - 100%
A 1:1 slope is the same thing as what in degrees? - CORRECT ANSWER - 45 degrees
The angle of repose for sand is what degrees? - CORRECT ANSWER - 340 degrees**
In what ways do index contours differ from intermediate contours on a grading plan? -
CORRECT ANSWER - index contours are bolder, thicker, and labels in the center with
long dashes, and intermediate contours are thinner, lighter, and short dashed
A vertical slope (90 degrees) can be expressed as what gradient in percent? - CORRECT
ANSWER - 1:0, infinity
Excavated pond - CORRECT ANSWER - Constructing a pond by digging a pit below the
surrounding ground level.
