21.2.4 - California Bearing Ratio Test
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Practice Questions
Test your understanding with targeted questions
What is the purpose of a CBR test?
💡 Hint: Think about the role of soil in supporting structures.
What tool is used to apply pressure in the CBR test?
💡 Hint: Consider the instrument that penetrates the soil.
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Interactive Quizzes
Quick quizzes to reinforce your learning
What is the main purpose of the CBR test?
💡 Hint: Consider the role of the test in the context of pavement design.
True or False: The CBR test can only be done on undisturbed soil samples.
💡 Hint: Think about the flexibility of soil testing methodologies.
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Challenge Problems
Push your limits with advanced challenges
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?
💡 Hint: Think about how the strength of the soil impacts design choices.
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?
💡 Hint: Refer to how we handle differing CBR values from test results.
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