Practice Statistical Quality Control In Mix Design (4) - Acceptability Criteria in Concrete Mix Design

Practice: Statistical Quality Control in Mix Design

Lesson 4Acceptability Criteria in Concrete Mix Design

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9 questions

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3 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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Quiz
3 questions · about 2 min · pass mark 70%. Hints available.
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6 sample questions

Question 1.
Define standard deviation in your own words.
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Think about how spread out the numbers are.
Question 2.
What does a higher coefficient of variation indicate?
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It’s a ratio comparing standard deviation to mean.
3Question 3.
What does standard deviation measure?
- Consistency of results
- Average value
- Deviation from the mean
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Think about how closely your results cluster around the average.
4Question 4.
True or False: A higher coefficient of variation indicates lower variability.
- True
- False
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Recall what CV represents.
Question 5.
Given the following data: 15, 22, 19, 21, and 25 MPa, calculate the standard deviation and interpret the results in the context of concrete quality.
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Remember to calculate the mean first and then use the standard deviation formula.
Question 6.
If a control chart is showing consistent readings above the UCL for several consecutive days, what actions should be taken, and why?
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Focus on the consequences of unregulated strength deviations.

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