L2 EAL Unit 003 Revision 6

Which of the following is a factor that makes materials suitable for engineering applications?

• Color

• Available forms of supply

• Taste

• Odor

What is an example of a metallic material used in engineering?

• Wood

• Glass

• Cast iron

• Rubber

Which of the following is a form of supply for engineering materials?

• Liquid

• Gas

• Sheet

• Powder

Which material is classified as a thermoplastic?

• Nylon

• Cast iron

• Carbon fiber

• Bronze

What should learners consider when applying materials to engineering applications?

• The color of the material

• How materials are applied and why

• The taste of the material

• The smell of the material

Which of the following is a property associated with basic engineering materials?

• Elasticity

• Photosensitivity

• Magnetism

• Radioactivity

Which heat treatment process is used to change the properties of materials?

• Hardening

• Cooling

• Painting

• Polishing

How can the application of heat affect the properties of materials?

• Increase in property

• Decrease in property

• No change

• All of the above

Which property makes materials suitable for thermal and electrical insulation?

• Conductivity

• Elasticity

• Dielectric strength

• Malleability

Answer explanation

Dielectric strength refers to a material's ability to withstand electric stress without conducting electricity. This property is crucial for thermal and electrical insulation, making it the correct choice.

Which of the following is a common SI unit?

• Pound

• Gallon

• Temperature

• Inch