Practice Exercise for Lesson 1
PRACTICE EXERCISE FOR LESSON 1
Instructions
Check your understanding of Lesson 1 by completing the practice exercise. There is only one correct
answer to each question. Try to answer all of the questions without referring to the lesson materials.
When you have completed all of the questions, turn the page and check your answers against the correct
responses. Each correct response is referenced to specific portions of the lesson material so that you can
review any questions you have missed or do not understand, before continuing to the next lesson.
Use Table 3, Page 16, for Question 1.
1.
What are the requirements for the percentage of gradation passing the #10 sieve for a road with a
design CBR of 40?
a.
50 percent
b.
80 percent
c.
90 percent
d.
100 percent
2.
Which of the four layers in a flexible pavement are most affected by tire pressure variation?
a.
the surface course
b.
the base course
c.
the subbase course
d.
the subgrade
3.
You have laboratory reports that show that select material has a plasticity index (PI) value of 7.
What percent of compaction (Modified ASSHO, CE 55 Compactive effort) would you specify?
a.
100 percent
b.
95 percent
c.
90 percent
d.
85 percent
4.
What is the compaction requirement for a base course?
a. 85 percent
b. 90 percent
c. 95 percent
d. 100 percent
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