Stress, strain, and elasticity MCQs – Aerospace

1. In aerospace structures, stress analysis is crucial to prevent:
(A) Fatigue failure
(B) Aerodynamic drag
(C) Electrical resistance
(D) Thermal expansion

2. The ability of an aerospace material to return to its original shape after deformation is called:
(A) Plasticity
(B) Elasticity
(C) Hardness
(D) Toughness

3. Which modulus is used to measure the stiffness of aircraft materials under tensile stress?
(A) Bulk modulus
(B) Young’s modulus
(C) Shear modulus
(D) Poisson’s ratio

4. In aerospace materials, strain hardening occurs when:
(A) The material is heated above its melting point
(B) A material undergoes plastic deformation and increases in strength
(C) The load is removed and the material returns to its original shape
(D) The structure undergoes aerodynamic loading

5. What type of stress is experienced by an aircraft wing in level flight due to aerodynamic lift?
(A) Tensile stress
(B) Compressive stress
(C) Shear stress
(D) Torsional stress

6. Poisson’s ratio in aerospace materials represents the ratio of:
(A) Stress to strain
(B) Axial strain to lateral strain
(C) Lateral strain to axial strain
(D) Elastic limit to yield strength

7. What type of failure occurs in an aircraft fuselage due to excessive cyclic loading?
(A) Creep failure
(B) Buckling failure
(C) Fatigue failure
(D) Thermal failure

8. The modulus of resilience of a material is a measure of its ability to:
(A) Resist impact loads
(B) Absorb energy before yielding
(C) Maintain elasticity at high temperatures
(D) Withstand repeated cyclic loading

9. Which of the following materials exhibits the highest Young’s modulus, making it ideal for aerospace structures?
(A) Aluminum alloy
(B) Titanium alloy
(C) Carbon fiber-reinforced polymer
(D) Steel

10. The shear modulus of a material is most important when analyzing:
(A) Axial tension in fuselage panels
(B) Bending in aircraft wings
(C) Torsional deformation in helicopter rotors
(D) Thermal expansion of jet engine components