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WorksheetsUnderstanding Plastics
Total questions: 10
Worksheet time: 5mins
What is a key characteristic of thermoplastics?
They cannot be remoulded once set.
They can be remoulded multiple times.
They are always biodegradable.
They are always transparent.
What happens to thermoset plastics when they are heated after setting?
They melt and can be reshaped.
They become softer but retain their shape.
They burn or char.
They dissolve in water.
Which of the following is an example of a thermoplastic?
Epoxy resin
Polyethylene
Bakelite
Melamine
Why are thermoset plastics often used in high-temperature applications?
They are cheaper than thermoplastics.
They are more flexible.
They do not melt when heated.
They are transparent.
Which of the following is a disadvantage of thermoplastics?
They are difficult to recycle.
They can melt when exposed to high temperatures.
They are always brittle.
They are not available in different colours.
What is the primary difference between thermoplastics and thermoset plastics?
Thermoplastics are always heavier.
Thermoset plastics can be remoulded.
Thermoplastics can be remoulded multiple times.
Thermoset plastics are always transparent.
Which of the following is a property of thermoset plastics?
They are soluble in water.
They can be reshaped after setting.
They are rigid and heat-resistant.
They are always flexible.
What is a common application of thermoplastics?
Circuit boards
Car tyres
Plastic bottles
Ceramic tiles
Which of the following materials is a thermoset plastic?
Polyvinyl chloride (PVC)
Nylon
Polyester resin
Polypropylene
Name the main sources of Polymers
Crude Oil
Coal
Ores
Natural Gas
