WorksheetsManufacturing Materials and Their Forms
Total questions: 20
Worksheet time: 10mins
What best describes an engineering material?
Any material found in nature
Materials used only in machines
Materials used in engineering applications
Only metallic materials
Which of the following is an example of an engineering application?
A leaf
A light bulb
Rainwater
Soil
Which of the following is NOT a main class of engineering materials?
Metals
Polymers
Ceramics
Lubricants
Which material class is most commonly used for high-temperature structural applications?
Polymers
Ceramics
Elastomers
Foams
A metal product with thickness less than 0.2 mm is called:
Plate
Sheet
Foil
Billet
Which of the following is a common standard form of plastics?
Bars
Sheets
Pellets
Plates
Powders are commonly used as starting forms for which materials?
Metals only
Plastics only
Ceramics and composites
Elastomers
Which of the following is NOT a typical material selection criterion?
Performance requirements
Colour preference of the engineer
Cost of production
Compatibility with manufacturing processes
For a bicycle frame, which property is MOST critical for performance?
Electrical conductivity
Weight
Optical transparency
Thermal insulation
Why is tungsten suitable for an incandescent light bulb filament?
Low melting point
High oxidation rate
High melting point
Low electrical resistance
Plastic lunch boxes are commonly manufactured using:
Machining
Forging
Injection moulding
Casting
Gear wheels are typically manufactured using which process?
Blow moulding
Machining
Extrusion
Sintering
Why is a knife blade quenched after forging?
To reduce cost
To improve hardness
To improve ductility
To improve ductility
Failure that occurs due to repeated cyclic loading is called:
Creep failure
Brittle fracture
Fatigue failure
Wear
Which of the following is an environmental degradation mechanism?
Ductile fracture
Corrosion
Residual stress failure
Thermal cracking
Approximately what fraction of manufacturing cost is due to materials?
10%
25%
50%
80%
Which cost component includes cutting tools and moulds?
Labour
Capital
Tooling
Fixed costs
Materials that can return to their original shape after deformation are called:
Nanomaterials
Composites
Shape memory alloys
Bioceramics
Which future material trend is MOST relevant for medical implants?
Biocompatible materials
Shape memory alloys
Nanomaterials
Structural steels
Which material property is MOST important when selecting a material for a high-speed rotating shaft?
Electrical conductivity
Fatigue strength
Density
Optical transparency
