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7.3. Precautions
This section
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Mixed questions from across the chapter. Your answers get marked.
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Flashcard drill
4 cards from this lesson. Good the night before a test.
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- 1.
What is segregation in concrete?
Hint
Think about the components of concrete.
- 2.
What causes rapid evaporation in fresh concrete?
Hint
Consider elements of the weather.
- 3.
What is the term for the separation of aggregates in fresh concrete?
- Segregation
- Bleeding
- Curing
Hint
Think about why mixing is so important.
- 4.
True or False: Over-vibrating concrete can cause segregation.
- True
- False
Hint
Consider what happens when you shake things too much.
- 5.
How does temperature affect the initial setting time of concrete?
Hint
Think about how heat affects other processes in life.
- 6.
Analyze the risks of not covering fresh concrete during placement in the rain.
Hint
What happens when you add too much water to a solid mixture?
Exercises
Total Questions
2
Estimated Time
4 min
Passing Score
70%
Instructions
- Read each question carefully
- You can use hints if you need help
- Complete all questions before submitting
4 more questions available
Enrol freeQuiz
Total Questions
2
Estimated Time
4 min
Passing Score
70%
Instructions
- Read each question carefully
- You can use hints if you need help
- Complete all questions before submitting
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Enrol freeChallenge Problems
Total Questions
2
Estimated Time
4 min
Passing Score
70%
Instructions
- Read each question carefully
- You can use hints if you need help
- Complete all questions before submitting