AP ECET CIVIL ENGINEERING Multiple Choice Questions (MCQs)

AP ECET Civil Engineering - Strength of Materials MCQs

1. Which of the following is true for ductile materials?
   A) They can undergo large plastic deformations before fracture
   B) They fail suddenly without any plastic deformation
   C) They have low tensile strength
   D) They are more brittle than brittle materials
   Answer: A) They can undergo large plastic deformations before fracture
2. Hooke’s law states that the stress is directly proportional to:
   A) Strain
   B) Temperature
   C) Length
   D) Area
   Answer: A) Strain
3. The lateral strain in a material is:
   A) The strain in the direction of the applied force
   B) The strain perpendicular to the applied force
   C) The strain at right angles to the material's length
   D) The strain in the opposite direction of the applied force
   Answer: B) The strain perpendicular to the applied force
4. Poisson’s ratio is the ratio of:
   A) Lateral strain to axial strain
   B) Axial strain to lateral strain
   C) Axial stress to lateral strain
   D) Lateral stress to axial strain
   Answer: A) Lateral strain to axial strain
5. Elastic constants include:
   A) Young’s modulus
   B) Shear modulus
   C) Bulk modulus
   D) All of the above
   Answer: D) All of the above
6. The relation between Young's modulus (E), shear modulus (G), and Poisson’s ratio (ν) is:
   A) E = 2G(1 + ν)
   B) E = G(1 + ν)
   C) E = G(1 - ν)
   D) E = 2G(1 - ν)
   Answer: A) E = 2G(1 + ν)
7. In composite sections, the overall behavior is determined by:
   A) The material with the highest modulus of elasticity
   B) The material with the lowest modulus of elasticity
   C) The composite section's overall cross-sectional area
   D) The materials' stiffness and cross-sectional area distribution
   Answer: D) The materials' stiffness and cross-sectional area distribution
8. Resilience is defined as:
   A) The ability of a material to absorb and release energy
   B) The resistance to fracture
   C) The energy absorbed per unit volume
   D) The energy absorbed until yield point
   Answer: A) The ability of a material to absorb and release energy
9. Strain energy is the energy stored in a material due to:
   A) A change in volume
   B) A change in temperature
   C) Deformation under load
   D) A change in material properties
   Answer: C) Deformation under load
10. When a material is loaded gradually, the stress is:
    A) Equal to the strain energy stored
    B) Proportional to the strain energy stored
    C) Directly proportional to the strain
    D) Indirectly proportional to the strain
    Answer: B) Proportional to the strain energy stored
11. Shear force is defined as:
    A) The internal force that resists bending
    B) The external force applied to the structure
    C) The internal force that resists shear deformation
    D) The external moment applied to the structure
    Answer: C) The internal force that resists shear deformation
12. The bending moment at a point on a beam is:
    A) The moment of the internal force at that point
    B) The moment of the external load at that point
    C) The moment resulting from the shear force at that point
    D) The moment resulting from the axial force at that point
    Answer: A) The moment of the internal force at that point
13. In a cantilever beam, the shear force is zero at:
    A) The free end
    B) The fixed support
    C) The midpoint
    D) The quarter-point
    Answer: B) The fixed support
14. For a simply supported beam under a uniform distributed load (UDL), the maximum bending moment occurs at:
    A) The midpoint of the beam
    B) The fixed support
    C) The free end
    D) Quarter-point of the beam
    Answer: A) The midpoint of the beam
15. Which of the following statements is true for a fixed beam under point load?
    A) The bending moment is maximum at the free end
    B) The shear force is zero at the midpoint
    C) The bending moment is maximum at the fixed support
    D) The beam is not subjected to any deformation
    Answer: C) The bending moment is maximum at the fixed support

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