Practice California Bearing Ratio Test (21.2.4) - Pavement materials: Soil

Practice: California Bearing Ratio Test

Lesson 21.2.4Pavement materials: Soil

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8 questions

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6 sample questions

Question 1.
What is the purpose of a CBR test?
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Think about the role of soil in supporting structures.
Question 2.
What tool is used to apply pressure in the CBR test?
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Consider the instrument that penetrates the soil.
3Question 3.
What is the main purpose of the CBR test?
- To assess moisture
- To evaluate soil strength
- To measure temperature
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Consider the role of the test in the context of pavement design.
4Question 4.
True or False: The CBR test can only be done on undisturbed soil samples.
- True
- False
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Think about the flexibility of soil testing methodologies.
Question 5.
A contractor is using soil with a CBR value of 15% for road construction. What implications does this have for the thickness of pavement required?
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Think about how the strength of the soil impacts design choices.
Question 6.
During a CBR test, the 2.5 mm penetration ratio was found to be 45%, and the 5 mm ratio was higher than that. If repeated testing confirms this, what CBR value should be reported?
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Refer to how we handle differing CBR values from test results.

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