LESSON 6
PRACTICE EXERCISE
ANSWER KEY AND FEEDBACK
Item
Correct Answer and Feedback
1.
D
Terracing
There are three commonly... (page 6-1)
2.
A
Decrease the slope of the pipe.
Changing the slope of the... (page 6-4)
3.
B
Conditions causing subsurface erosion.
The subsurface conditions... (page 6-6)
4.
Open channels
To review briefly, the means... (page 6-3)
5.
B
Where it will not become a traffic hazard.
Where ditches will not interfere... (page 6-7)
6.
C
Sand blanket
Sand is placed... (page 6-7)
EN5465
6-12
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