Practice - Subgrade and Sub-base Preparation
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Practice Questions
Test your understanding with targeted questions
What is the minimum compaction percentage for subgrade preparation?
💡 Hint: It’s a percentage related to soil compaction.
What material is often used for sub-bases?
💡 Hint: Think about stable materials that can handle loads.
4 more questions available
Interactive Quizzes
Quick quizzes to reinforce your learning
What is the required compaction level for subgrade?
💡 Hint: It’s a percentage, make sure it’s high enough!
True or False: The sub-base can be made from organic materials.
💡 Hint: Think about the stability of the materials.
1 more question available
Challenge Problems
Push your limits with advanced challenges
Given a scenario where pavement has multiple cracks developing after a year, analyze the potential issues with the subgrade preparation and suggest corrective actions.
💡 Hint: Look at the factors contributing to soil stability.
If the sub-base depth is reduced from the standard 150 mm to 80 mm, describe the effects this might have on pavement performance in heavy traffic areas.
💡 Hint: Think about how the thickness affects weight support.
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Reference links
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