Structural Analysis – Multiple Choice Questions (MCQs)

1. 97. What is a 'conjugate beam'?

   • A. A hypothetical beam used in the conjugate beam method to determine slopes and deflections of a real beam
   • B. A real beam with complex loading
   • C. A beam with infinite length
   • D. A beam with no load

2. 98. In the conjugate beam method, what does the shear force in the conjugate beam represent in the real beam?

   • A. Slope
   • B. Deflection
   • C. Bending moment
   • D. Axial force

3. 99. In the conjugate beam method, what does the bending moment in the conjugate beam represent in the real beam?

   • A. Slope
   • B. Deflection
   • C. Shear force
   • D. Axial force

4. 100. What is 'virtual force'?

   • A. An imaginary infinitesimal force system in equilibrium
   • B. An actual force
   • C. A large force
   • D. A force that causes failure

5. 101. What is 'strain energy density'?

   • A. Strain energy per unit volume
   • B. Total strain energy
   • C. Strain energy per unit length
   • D. Strain energy per unit area

6. 102. What is 'section modulus' (S)?

   • A. A geometric property of a cross-section used to calculate bending stress
   • B. The moment of inertia
   • C. The area of the section
   • D. The radius of gyration

7. 103. What is 'complementary energy'?

   • A. A concept in structural analysis related to the force method and used for non-linear elastic problems
   • B. A type of potential energy
   • C. A type of kinetic energy
   • D. A type of thermal energy

8. 104. What is 'arch' in structural analysis?

   • A. A curved structural member that primarily carries loads by axial compression
   • B. A straight beam
   • C. A flat slab
   • D. A truss

9. 105. What is a 'cable' in structural analysis?

   • A. A flexible structural member that primarily carries loads by axial tension
   • B. A rigid member
   • C. A member that carries compression
   • D. A member that carries bending

10. 106. What is 'tension coefficient method' for trusses?

    • A. A method where the force in each member is expressed as the product of a tension coefficient and the length of the member
    • B. A method for frames
    • C. A method for beams
    • D. A method for cables

11. 107. What is the 'flexibility matrix' in the force method?

    • A. A matrix that relates redundant forces to displacements
    • B. A matrix that relates displacements to forces
    • C. A matrix for material properties
    • D. A matrix for loads

12. 108. What is the 'stiffness matrix' in the stiffness method?

    • A. A matrix that relates unknown joint displacements to applied forces
    • B. A matrix that relates forces to displacements
    • C. A matrix for material properties
    • D. A matrix for loads