Load distribution in aircraft wings and fuselage MCQs – Aerospace

1. What is the unit of stress in the SI system?
(A) Pascal (Pa)
(B) Newton (N)
(C) Joule (J)
(D) Watt (W)

2. Strain is defined as the ratio of
(A) Force to area
(B) Change in length to original length
(C) Load to volume
(D) Stress to force

3. What is the term for the maximum stress that a material can withstand without permanent deformation?
(A) Yield strength
(B) Ultimate tensile strength
(C) Fracture strength
(D) Shear strength

4. Which of the following best describes Hooke’s Law?
(A) Stress is proportional to strain within the elastic limit
(B) Stress is inversely proportional to strain
(C) Strain is proportional to the square of stress
(D) Stress remains constant regardless of strain

5. What is the modulus of elasticity (Young’s modulus) a measure of?
(A) The toughness of a material
(B) The ability to return to its original shape after deformation
(C) The stiffness of a material
(D) The density of a material

6. Which type of stress occurs when forces act parallel to the surface of a material?
(A) Tensile stress
(B) Compressive stress
(C) Shear stress
(D) Normal stress

7. What is Poisson’s ratio?
(A) The ratio of stress to strain
(B) The ratio of lateral strain to axial strain
(C) The ratio of elastic limit to yield strength
(D) The ratio of ultimate tensile strength to fracture strength

8. Which property defines a material’s ability to absorb energy before fracturing?
(A) Elasticity
(B) Toughness
(C) Hardness
(D) Plasticity

9. What happens when a material is loaded beyond its yield strength?
(A) It undergoes elastic deformation
(B) It experiences permanent plastic deformation
(C) It fractures immediately
(D) Its density increases

10. Which modulus is associated with the deformation of a material under shear stress?
(A) Bulk modulus
(B) Young’s modulus
(C) Shear modulus
(D) Elastic modulus