Post Test Engg Materials

Which of the following is NOT a primary classification of engineering materials?

• Metals

• Polymers

• Cement

• Ceramics

What is the main advantage of composite materials?

• Low cost

• High density

• Combination of properties from different materials

• Brittle nature

Which of the following is an amorphous material?

• Quartz

• Glass

• Steel

• Copper

The primary bonds in metals are:

• Ionic bonds

• Covalent bonds

• Metallic bonds

• Van der Waals bonds

What type of material is commonly used in aircraft structures?

• Wood

• Steel

• Aluminum alloys

• Cast iron

Which property measures a material’s ability to resist deformation under stress?

• Hardness

• Ductility

• Toughness

• Stiffness

The ability of a material to be drawn into wires is called:

• Ductility

• Malleability

• Brittleness

• Toughness

Hardness of a material can be tested using:

• Charpy test

• Brinell test

• Torsion test

• Creep test

What is the ability of a material to absorb energy before fracture?

• Hardness

• Toughness

• Resilience

• Fatigue strength

Fatigue failure occurs due to:

• Repeated loading and unloading

• Excessive hardness

• High thermal expansion

• Ductile fracture