Aerospace Materials Quiz

Why are composites used in modern aerospace structures?

• They are made from wood and fabric.

• They are easy to repair.

• They have a high strength-to-weight ratio.

• They are inexpensive to produce.

What is the primary advantage of titanium alloys?

• High temperature resistance

• Low cost

• Low weight

• Easy to manufacture

How does Young’s modulus relate to material stiffness?

• Young’s modulus does not relate to stiffness.

• Higher Young’s modulus means more stiffness.

• Lower Young’s modulus means more stiffness.

• Higher Young’s modulus means more flexibility.

Why do aircraft need materials with high fatigue resistance?

• To reduce manufacturing costs.

• To withstand repeated loading cycles.

• To improve aesthetic appearance.

• To increase fuel efficiency.

What is the role of 3D printing in aerospace manufacturing?

• It increases material waste.

• It makes materials heavier.

• It allows for complex geometries and lightweight designs.

• It is used only for decorative parts.

What is a disadvantage of composite materials?

• High manufacturing cost

• Poor corrosion resistance

• Low fatigue resistance

• Low strength-to-weight ratio

Which material is known for its excellent corrosion resistance?

• Composite materials

• Stressed-skin aluminum

• Titanium alloys

• Wood and fabric

What is a characteristic of sandwich structures?

• They are used only in spacecraft.

• They consist of a lightweight core and composite or aluminum skins.

• They are made entirely of metal.

• They are not used in aerospace applications.

What is a key takeaway about material selection in aerospace?

• New materials are not important.

• Only traditional materials should be used.

• Strength, weight, durability, and cost must be balanced.

• Cost is the only factor to consider.

What is an emerging aerospace material mentioned in the text?

• Wood

• Graphene

• Steel

• Plastic