Composites Practice Quiz

What is the primary function of matrix materials in aerospace composites?

• To provide electrical conductivity

• To act as a binder for reinforcement materials

• To enhance the aesthetic appeal of the material

• To increase the weight of the material

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DOK Level 1: Recall

Which type of concrete is most likely used in aerospace applications for fire resistance?

• High-performance concrete

• Lightweight concrete

• Fiber-reinforced concrete

• Air-entrained concrete

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DOK Level 1: Recall

What does Young’s Modulus measure in aerospace materials?

• Electrical resistance

• Thermal conductivity

• Stiffness

• Malleability

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DOK Level 1: Recall

What is the purpose of conducting a Three Point Bend Test on aerospace materials?

• To measure tensile strength

• To determine flexibility

• To assess fracture toughness

• To check color consistency

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DOK Level 1: Recall

Which type of particle reinforcement is commonly used in aerospace materials to improve mechanical properties?

• Sand particles

• Ceramic particles

• Plastic beads

• Wood chips

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DOK Level 1: Recall

What is the role of fibers or whiskers in reinforced aerospace materials?

• To increase thermal insulation

• To enhance tensile strength

• To improve paint adhesion

• To reduce cost

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DOK Level 1: Recall

How does the addition of fibers affect the Young's Modulus of aerospace composites?

• Decreases it significantly

• No impact

• Increases it

• Makes it variable

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DOK Level 2: Skill/Concept

In the context of aerospace materials, why is high stiffness important?

• It allows for easier machining

• It reduces the weight of the structure

• It ensures structural integrity under load

• It enhances electrical conductivity

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DOK Level 2: Skill/Concept

During a Three Point Bend Test, what does a higher deflection at the midpoint suggest about the material's properties?

• Higher stiffness

• Lower toughness

• Higher flexibility

• Lower thermal stability

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DOK Level 2: Skill/Concept

What advantage does particle reinforcement provide to aerospace materials under thermal stresses?

• Decreases thermal expansion

• Increases thermal expansion

• No impact on thermal properties

• Increases electrical conductivity

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DOK Level 2: Skill/Concept