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Practice Questions
Test your understanding with targeted questions related to the topic.
Question 1
Easy
What does prestressed concrete aim to prevent?
💡 Hint: Think about the purpose of prestressing.
Question 2
Easy
What is an important property of materials used in prestressing?
💡 Hint: Focus on the strength of steel.
Practice 4 more questions and get performance evaluation
Interactive Quizzes
Engage in quick quizzes to reinforce what you've learned and check your comprehension.
Question 1
What is the maximum compressive strength of prestressed concrete?
- 6,000 psi
- 8,000 psi
- 10,000 psi
💡 Hint: Consider the capacity advantage over traditional concrete.
Question 2
True or False: High yield stress steel is used to minimize crack widths.
- True
- False
💡 Hint: Think about the purpose of high-strength materials.
Solve 1 more question and get performance evaluation
Challenge Problems
Push your limits with challenges.
Question 1
A prestressed concrete beam has an initial prestress of 160 ksi but experiences a loss of 25 ksi due to creep and steel relaxation. What is the effective residual stress?
💡 Hint: Subtract the losses from initial prestress.
Question 2
If a strand composed of 7 wires has an initial stress of 150 ksi and has a relaxation loss of 10 ksi, is the remaining stress sufficient for a design requiring a minimum of 130 ksi?
💡 Hint: Keep track of the stress after relaxation to ensure it meets design requirements.
Challenge and get performance evaluation