ECE Intervention 6

What type of bond holds the particles together within an atomic nucleus?

• lonic bond

• Covalent bond

• Hydrogen bond

• Strong nuclear force

What type of bond is typically found in semiconductors?

• lonic bond

• Covalent bond

• Metallic bond

• Hydrogen bond

What is the primary reason why aluminum is corrosion-resistant?

• It is a noble metal

• It forms a protective oxide layer

• It does not react with oxygen

• It contains stainless steel components

Which of the following materials is known for having a high hardness-to-weight ratio?

• Copper

• Composite Material

• Lead

• Brass

What conductive material is commonly used in flexible electronics?

• Copper

• Silver

• Gallium Arsenide

• Graphene

Which type of corrosion occurs when two different metals are in contact with each other and an electrolyte, leading to one metal corroding faster than the other?

• Pitting corrosion

• Galvanic corrosion

• Crevice corrosion

• Stress corrosion cracking

Compared to metals, polymers generally exhibit:

• Higher strength and stiffness

• Higher density and brittleness

• Lower density and flexibility

• Higher melting temperature and hardness

What is the process called that removes hardness from water?

• Filtration

• Sedimentation

• Softening

• Distillation

What is a substance that attracts pieces of iron?

• Conductor

• Semiconductor

• Magnet

• Semimetal

Which property makes ceramics suitable for high-temperature applications?

• Low hardness

• High electrical conductivity

• High melting point

• Ductility