6/5 Engineering and Manufacturing Session Quiz

What is a key objective for learners in the Engineering and Manufacturing session?

• Understand the definition of thermoplastics, thermosets, elastomers, and composites

• Learn about the history of engineering

• Study the properties of metals

• Explore the basics of electrical circuits

Which of the following statements is true about thermosets?

• They can melt under heat after curing.

• They are not polymers.

• They retain their form and stay solid under heat once cured.

• They behave the same as thermoplastics when exposed to heat.

What is a thermoplastic?

• A resin that is solid at room temperature but becomes plastic and soft upon heating

• A material that remains hard and brittle at all temperatures

• A type of metal that melts at high temperatures

• A liquid that solidifies when cooled

Which of the following is a use of polyester resin?

• Insulating foams

• Electrical insulators

• Filament winding

• Shoe soles

Which thermoset is commonly used in plywood, particleboard, and medium-density fibreboard (MDF)?

• Melamine resin

• Diallyl-phthalate (DAP)

• Urea-formaldehyde foam

• Epoxy resin

How does the strength of thermoplastics primarily arise?

• Crosslinking

• Crystallinity

• High melting point

• Network polymer structure

What property allows elastomers to return to their original shape after being stretched?

• Rigidity

• Flexibility and elasticity

• Brittleness

• Hardness

What is the primary function of the matrix in a composite material?

• To provide color and texture

• To protect fibres from environmental damage

• To increase the weight of the material

• To conduct electricity

Which of the following is NOT a type of strength that affects the use and design of composites?

• Tensile strength

• Shear strength

• Compressive strength

• Elastic strength

What is MDF manufactured from?

• Thin layers of wood bonded together

• Different wood fibres compressed together

• Epoxy resin reinforced with glass fibre

• Polyester resin reinforced with carbon fibres