Introduction to Plastics (Leaving Cert Engineering): Quizzes
📚Quizzes
Practise the questions
15 questions from this quiz
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Practise the questions
15 questions from this quiz
What type of material is plastic?
What type of material is plastic?
Synthetic polymer
What are the small units that make up polymers called?
What are the small units that make up polymers called?
Monomers
What is the process of creating polymers from smaller molecules called?
What is the process of creating polymers from smaller molecules called?
Polymerization
Who created the first manufactured plastic in 1862?
Who created the first manufactured plastic in 1862?
Alexander Parkes
What was the major safety problem with celluloid plastic?
What was the major safety problem with celluloid plastic?
Highly flammable
In which year was Bakelite discovered?
In which year was Bakelite discovered?
1907
What key property made Bakelite revolutionary for electrical components?
What key property made Bakelite revolutionary for electrical components?
Excellent electrical insulation
When did Baekeland coin the term 'plastics'?
When did Baekeland coin the term 'plastics'?
1909
How many resin identification codes are used for recycling plastics?
How many resin identification codes are used for recycling plastics?
Seven
Which recycling code is used for PVC?
Which recycling code is used for PVC?
#3
What molecular structure do thermoplastics have?
What molecular structure do thermoplastics have?
Linear chain (like string of pearls)
What happens to thermoplastics when heated?
What happens to thermoplastics when heated?
They melt
What molecular structure do thermoset plastics have?
What molecular structure do thermoset plastics have?
Three-dimensional network
What happens to thermoset plastics once they are formed?
What happens to thermoset plastics once they are formed?
Cannot return to liquid state
What is the function of plasticizers as additives in plastics?
What is the function of plasticizers as additives in plastics?
Improve flexibility and workability