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WorksheetsMaterials Engineering Quiz
Total questions: 19
Worksheet time: 4mins
What are the 4 main categories of materials?
Polymers, composites, ceramics, metals
Polymers, alloys, ceramics, metals
Polymers, composites, alloys, metals
Polymers, composites, ceramics, alloys
Why are metals different from plastics?
Metals have covalent bonds, while plastics have metallic bonds.
Metals are formed by small monomers, while plastics have a crystalline structure.
Metals are chemically bonded, while plastics have free electrons.
Metals have a crystalline structure, while plastics are formed by small monomers.
Which materials are used in micro engineering?
micro processors
Ceramics such as concrete and metals such as wrought steel
Polymers and composites such as GRP, CFC
Composites such as wood and metals such as wrought iron
Which materials are used in aviation engineering?
Ceramics such as concrete
Composites such as carbon fibre and lightweight metals
Polymers such as plastics
Mild steel
What types of bonds are in plastics?
Hydrogen bonds
Metallic bonds
Ionic bonds
Close compound bonds - molecular and covalent bonds
What types of bonds are in ceramics?
Covalent and ionic bonds
Metallic bonds
Close compound bonds
Hydrogen bonds
What is it called if carbon fibres are used instead of glass in polyester?
Carbon compounds (CC)
Glass reinforced fibre (GFR)
Carbon fibre reinforced plastics (CFRP)
Polyester fibre
What is the most common material used in car bumpers now?
Carbon fibre
Stainless steel
Mild steel
Polypropylene and ABS
Why are polypropylene and ABS used in car bumpers?
cheaper than most metals, easily formed, malleable, ductile
Heavier than most metals, difficult to form, expensive
Tougher than most metals, easily formed, lightweight, non-oxiding
heat insulating, weatherproof
What are cermets?
Compounds of ceramic particles bonded with a metallic matrix.
Compounds of metallic particles bonded with a ceramic matrix.
Compounds of plastic particles bonded with a metallic matrix.
Compounds of ceramic particles bonded with a plastic matrix.
What properties can be affected by the sintering method used in cermets?
Density and porosity.
Conductivity and transparency.
Flexibility and elasticity.
Density and mechanical properties.
What does particle reinforcement in cermets mean?
Mixing reinforcement particles with ductile metal feed powders.
Mixing reinforcement particles with brittle ceramic feed powders.
Mixing reinforcement particles with flexible plastic feed powders.
Mixing reinforcement particles with brittle metal feed powders.
What can affect the preparation process of cermets?
Strength and hardness.
Grain size and degree of densification.
Performance under different conditions.
Conductivity and transparency.
What can the addition of graphene improve in cermets?
Flexibility and elasticity.
Strength and hardness.
Conductivity and transparency.
Density and porosity.
What sintering method is mentioned in the text?
Microwave sintering.
Laser sintering.
Spark plasma sintering.
Induction sintering.
What is the primary advantage of using composites in aerospace engineering?
High density
Low cost
High strength-to-weight ratio
Easy recyclability
Which type of bond is predominant in metals?
Covalent bonds
Ionic bonds
Metallic bonds
Hydrogen bonds
What is a key characteristic of ceramics that makes them suitable for high-temperature applications?
High electrical conductivity
High thermal conductivity
High melting point
High ductility
What is a common application of composites in the automotive industry?
Engine blocks
Body panels and interior components
Brake pads
Fuel tanks
