Castigliano’s first theorem is applicable / » Structural Analysis 2 solved MCQs / By admin Question: Castigliano’s first theorem is applicable A. for statically determinate structures only B. when the system behaves elastically C. only when principle of superposition is valid D. none of the above Answer» c. only when principle of superposition is valid Note: The above multiple-choice question is for all general and Competitive Exams in India.