Soil Erosion & Sedimentation Control Training - Unit 3
Study exam for the Soil Erosion and Sedimentation Control Training - Unit 3
- 1.The best way to prevent erosion is to remove the minimum amount of _____________ and re-establish it as soon as possible.
- A.
Vegetation
- B.
Topsoil
- C.
Ground cover
- D.
Water
- 2.A critical area is ____________________ to stabilize with vegetation. Whenever possible, critical areas should not be _________________.
- A.
Easy, re-established
- B.
Difficult, uncovered
- C.
Diffcult, disturbed
- D.
Easy, disturbed
- 3.A non-critical area is an area on which vegetation can be established without _____________.
- A.
Stabilization
- B.
Water
- C.
Ease
- D.
Difficulty
- 4.Sensitive areas are those areas next to __________ or __________ that can be easily damaged by sediment.
- A.
Forest, fields
- B.
Lakes, streams
- C.
Rivers, creeks
- D.
Slopes, mountains
- 5.Vegetation stabilization can be either ______________ or _____________.
- A.
Difficult, easy
- B.
Hard, easy
- C.
Temporary, permanent
- 6.Legumes furnish _________________ to the soil, an important plant nutrient.
- A.
Nitrogen
- B.
Acid
- C.
Oxygen
- D.
Moisture
- 7.When selecting plant materials for stabilization, consideration should be given to: (choose the answers that most apply)
- A.
Site use and maintenance
- B.
Slopes
- C.
Soil
- D.
Climate
- E.
Soil moisture content
- 8.Consideration should be given to on-site soil conditions such as: (choose the answers that most apply)
- A.
Soil moisture content
- B.
Nitrogen content
- C.
Fertility
- D.
Acidity
- E.
PH levels
- 9.Subsoils are generally low in ___________ and are __________.
- A.
PH, acid
- B.
Moisture, dry
- C.
Acidity, fertile
- D.
Fertility, acid
- 10.Topsoil should be _____________ at the beginning of grading operations for later use.
- A.
Saved
- B.
Removed
- C.
Washed
- D.
Fertilized
- 11.When slopes are steeper the _________ (horizontal/vertical), structures may be more effective to control erosion than vegetation.
- A.
3:1
- B.
4:1
- C.
2:1
- 12.Soil pH should be no lower that ________ for most grasses and no lower that __________ for legumes.
- A.
6.5, 4.5
- B.
4.5, 5.5
- C.
6.5, 5.5
- D.
5.5, 6.5
- 13.The amount of lime and/or fertilizer required for good vegetative growth can be determined through ______________________.
- A.
Soil moisture content
- B.
Area inspection
- C.
Soil testing
- D.
PH levels
- 14.Three factors that contribute to soil slippage are:
- A.
Poor bonding
- B.
Slope steepness
- C.
Lack of top dressing
- D.
Low moisture content
- E.
High moisture content
- 15.The four methods for establishing vegetation are:
- A.
Seeding
- B.
Top dressing
- C.
Sprigging
- D.
Sodding
- E.
Planting a root-balled or container grown shrub or tree
- 16.Sprigging involves planting _____________ of live vegetation.
- A.
Selections
- B.
Containers
- C.
Sprigs
- D.
Seedlings
- 17.It is important that ________________ and ______________ be done as soon as the seedbed is ready.
- A.
Top dressing, watering
- B.
Seeding, mulching
- C.
Sprigging, mulching
- D.
Top dressing, seeding
- 18._________________ insulates the soil from intense heat and cold, and conserves ____________.
- A.
Mulch, moisture
- B.
Straw, seeds
- C.
Top dressing, water
- D.
Sodding, moisture
- 19._________________ is the most commonly used mulch material.
- A.
Leaves
- B.
Paper
- C.
Straw
- D.
Bark
- 20.The two types of maintenance required for vegetation stabilization are: _____________ and _______________.
- A.
Seeding, mulching
- B.
Follow-up, periodic
- C.
Sprigging, sodding
- 21.Areas planted in the fall should be inspected in the ______________.
- A.
Winter
- B.
Spring
- C.
Summer
- D.
Fall
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