LESSON 1
PRACTICE EXERCISE
ANSWER KEY AND FEEDBACK
Item
Correct Answer and Feedback
1.
C.
60 to 80
Inert filler material, (usually sand and stone or gravel) ... (page 1-2)
Aggregates make up from 60 to 80 percent ... (page 1-6)
2.
A.
Entrained
If air is chemically induced ... (page 1-2)
3.
D.
Watertightness
Listed below are some principal limitations ... (page 1-3)
4.
A.
True
Water has two functions in concrete mix,... (page 1-6)
5.
C.
When the concrete contains aggregate much larger than 2 inches in size
The slump test does not apply if concrete contains ... (page 1-20)
6.
A.
True
After completing the slump measurement... (page 1-21)
EN5466
1-24
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