Practice Placing Of Concrete (3) - Mixing of Concrete - Civil Engineering Materials, Testing & Evaluation

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8 questions

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2 cards from this section. Quick, good the night before a test.
Exercise
6 questions · about 4 min · pass mark 70%. Hints available.
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2 questions · about 1 min · pass mark 70%. Hints available.
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6 sample questions

Question 1.
Why should concrete be placed close to its final position?
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Think about how handling affects the mixture.
Question 2.
What is segregation in concrete?
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Consider what might happen if materials are not mixed well.
3Question 3.
What is the maximum height from which concrete can be dropped?
- 1.0 meters
- 1.5 meters
- 2.0 meters
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Consider the guidelines mentioned.
4Question 4.
True or False: Segregation can improve concrete strength.
- True
- False
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Think about how the mixing affects strength.
Question 5.
Design a small-scale concrete pouring operation for a garden slab. What methods would you choose and why?
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Consider the size of tools and ease of movement.
Question 6.
Analyze the implications of placing concrete without following the specified 30-minute rule.
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Think about what happens to a mixture that's left sitting.

4 more questions in this section. Enroll free to practise them all.