CISEC Exam Questions And Answers Verified 100%
Correct
What is Sediment? - ANSWER The eroded material that settles in water or air.
What is sedimentation? - ANSWER The process by which eroded soil particles in
water or air are deposited in NEW locations.
Rate soils from Most Erodible to Least. - ANSWER 1. Silt = big particle/more
erodible k~0.57
2. Sand/Loam = medium
3. Clay = very small particles/least erodible k~0.10
Which direction does water flow? - ANSWER High points to low.
Through the mouth of the "V" from the back- up.
Basin divides - ANSWER Separates flows
-water that goes from low point to high. To extend the time of concentration
What is a hydrograph? - ANSWER a
"picture" of runoff x-axis = time in minutes
y-axis = flow in cubic ft/sec
The volume of runoff is everything under the curve (somewhat bell-shaped) -
similar to a sedigraph
, Sedimentation occurs at tail-end when flows are decreasing
Flocculants - ANSWER chemicals added to a mixture to make suspended particles
clump together
created larger particles that fall rapidly
method for reducing turbidity
Types of flocculants:
Cationic = dangerous for fish/can suffocate
Anionic = ok for fish
Who decides the necessary BMPs in a SWPPP/for a project? - ANSWER The
DEVELOPER (not inspector)
Types of Sediment Control BMPs - ANSWER - silt fences
- vehicle tracking pads
- SCS (sediment containment systems) / Filter Bags
- inlet barriers in front of "sump" D.I. or rocks around an Area Drain
- fiber rolls
- compost berms / compost socks
- bale / straw bale barriers
- rock check structure / riprap
- filter bags
Types of Erosion Control BMPs - ANSWER - placement of pavement
- installing landscaping materials
- establishing vegetation (native) / seeding
Correct
What is Sediment? - ANSWER The eroded material that settles in water or air.
What is sedimentation? - ANSWER The process by which eroded soil particles in
water or air are deposited in NEW locations.
Rate soils from Most Erodible to Least. - ANSWER 1. Silt = big particle/more
erodible k~0.57
2. Sand/Loam = medium
3. Clay = very small particles/least erodible k~0.10
Which direction does water flow? - ANSWER High points to low.
Through the mouth of the "V" from the back- up.
Basin divides - ANSWER Separates flows
-water that goes from low point to high. To extend the time of concentration
What is a hydrograph? - ANSWER a
"picture" of runoff x-axis = time in minutes
y-axis = flow in cubic ft/sec
The volume of runoff is everything under the curve (somewhat bell-shaped) -
similar to a sedigraph
, Sedimentation occurs at tail-end when flows are decreasing
Flocculants - ANSWER chemicals added to a mixture to make suspended particles
clump together
created larger particles that fall rapidly
method for reducing turbidity
Types of flocculants:
Cationic = dangerous for fish/can suffocate
Anionic = ok for fish
Who decides the necessary BMPs in a SWPPP/for a project? - ANSWER The
DEVELOPER (not inspector)
Types of Sediment Control BMPs - ANSWER - silt fences
- vehicle tracking pads
- SCS (sediment containment systems) / Filter Bags
- inlet barriers in front of "sump" D.I. or rocks around an Area Drain
- fiber rolls
- compost berms / compost socks
- bale / straw bale barriers
- rock check structure / riprap
- filter bags
Types of Erosion Control BMPs - ANSWER - placement of pavement
- installing landscaping materials
- establishing vegetation (native) / seeding
