Soil Erosion & Sedimentation Control Training - Unit 1
Study exam for the Soi Erosion and Sedimentation Control Training - Unit 1
- 1.Erosion and sedimentation result in loss of ________________ _______________ .
- A.
Vegetative cover
- B.
Fertile topsoil
- C.
Slope steepness
- D.
Surface roughness
- 2.Erosion and sedimentation result in _______________ ditches and storm sewers.
- A.
Muddy
- B.
Gully
- C.
Clogged
- D.
Erosion
- 3.Erosion and sedimentation result in muddy or _____________ lakes and streams.
- A.
Murky
- B.
Cloudy
- C.
Rill
- D.
Turbid
- 4.Erosion and sedimentation result in damage to _______________ and _________ life.
- A.
Plant, animal
- B.
Bird, insect
- C.
Vegetative, insect
- D.
Insect, bird
- 5.Erosion and sedimentation result in ____________ damage to roads and buildings.
- A.
Minor
- B.
Characteristics
- C.
Structural
- D.
Major
- 6.Erosion is the process where soil particles are ___________ or ________ and put in motion.
- A.
Dislodged
- B.
Deposited
- C.
Eroded
- D.
Detached
- E.
Displaced
- 7.Sedimentation is the process whereby detached particles are _____________ elsewhere.
- A.
Dislodged
- B.
Deposited
- C.
Displaced
- D.
Detached
- 8.Sediment is the product of _______________.
- A.
Dislodgement
- B.
Sheeting
- C.
Wind
- D.
Erosion
- 9.The two types of erosion are ___________ and ____________.
- A.
Accelerated
- B.
Wind
- C.
Water
- D.
Sheet
- E.
Geologic
- 10.Accelerated erosion is a speeding up of erosion due to ____________ activity.
- A.
Construction
- B.
Wind
- C.
Water
- D.
Human
- 11.Major erosive forces are water and ____________.
- A.
Wind
- B.
Human
- C.
Climate
- D.
Geologic
- 12.In some areas, more soil is lost from __________ erosion that from water erosion.
- A.
Accelerated
- B.
Sheet
- C.
Wind
- D.
Geologic
- 13.The effects of _____________ erosion are usually more visible the ___________ erosion.
- A.
Rill
- B.
Gully
- C.
Water
- D.
Wind
- E.
Sheet
- 14.The three categories of overland erosion are: ____________, ____________, and ____________.
- A.
Geologic, accelerated, animal
- B.
Sheet, water, gully
- C.
Animal, wind, water
- D.
Sheet, rill, gully
- 15.______________ erosion is the removal of a uniform layer of soil that generally goes unnoticed.
- A.
Sheet
- B.
Rill
- C.
Gully
- D.
Wind
- 16.The __________ of erosion defines the difference between rills and gullies.
- A.
Type
- B.
Length
- C.
Amount
- D.
Depth
- 17.The four physical factors affecting erosion are:
- A.
Vegetative cover
- B.
Depth of topsoil
- C.
Climate
- D.
Slope characteristics
- E.
Soil
- 18.The climate factors that influence erosion are ___________ amount, _____________, and ___________.
- A.
Precipitation, density, frequency
- B.
Precipitation, wind, intensity
- C.
Rainfall, wind, snow
- D.
Rainfall, intensity, frequency
- 19.Organic matter reduces erosion and off-site sedimentation by (choose 3):
- A.
Creating a barrier to slow runoff
- B.
Soaking up the rain water
- C.
Shielding the soil from the impact of rain
- D.
Lining ditches to prevent loss
- E.
Providing essentail nutrients for plant growth
- 20.Soil properties influencing erodibility include:
- A.
Size, shape, density
- B.
Texture, structure, cohesiveness
- C.
Size, structure, texture
- D.
Texture, size, cohesiveness
- 21.Texture refers to the ___________ of the soil particles.
- A.
Structure
- B.
Density
- C.
Shape
- D.
Size
- 22.Structure refers to how soil particles are ___________ together.
- A.
Stuck
- B.
Forced
- C.
Clumped
- D.
Deposited
- 23.Slope ___________, ____________, and ____________ affect erodibility.
- A.
Steepness, length, roughness
- B.
Size, shape, density
- C.
Texture, structure, cohesiveness
- D.
Length, shape, roughness
- 24.Sediment deposition occurs when soil-laden water ________ enough to allow the soil particle to settle out.
- A.
Runs
- B.
Slows
- C.
Evaporates
- D.
Moves
- 25.The _________, _________, and _________ of the transported particles influence the rate at which they settle out.
- A.
Texture, structure, cohesiveness
- B.
Steepness, length, roughness
- C.
Texture, size, roughness
- D.
Size, shape, density
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