Practice Mohr’s Circle Representation (1.2) - Unconfined Compression Test

Practice: Mohr’s Circle Representation

Lesson 1.2Unconfined Compression Test

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8 questions

Flashcard drill
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
2 questions · about 1 min · pass mark 70%. Hints available.
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6 sample questions

Question 1.
What does qu stand for in soil mechanics?
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Think about the test name.
Question 2.
What is the confining pressure during the unconfined compression test?
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Consider the definition of 'unconfined'.
3Question 3.
What is the main purpose of the unconfined compression test?
- To measure permeability
- To determine unconfined compressive strength
- To evaluate soil density
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Think about what we measure in soil mechanics.
4Question 4.
True or False: The minor principal stress in an unconfined compression test is always negative.
- True
- False
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Consider the definition of minor principal stress in this context.
Question 5.
Given a soil sample with an unconfined compressive strength of 200 kPa, how would the failure point shift if the degree of saturation decreases from 100% to 80%?
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Reflect on how saturation affects soil mechanics and strength.
Question 6.
Construct Mohr's Circle for a soil undergoing unconfined compression where the applied axial stress at failure is 150 kPa. Label all important points and explain their significance.
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Make sure to include stress states that indicate shear and failure conditions.

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