Plastics (Junior 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 was the first true synthetic plastic developed in 1909?
What was the first true synthetic plastic developed in 1909?
Bakelite
What is the primary raw material that serves as the foundation for all plastics?
What is the primary raw material that serves as the foundation for all plastics?
Crude oil
What is the chain-forming process called where smaller molecules chemically bond together?
What is the chain-forming process called where smaller molecules chemically bond together?
Polymerisation
Which two fundamental properties do all plastics possess?
Which two fundamental properties do all plastics possess?
Durability and plasticity
What key characteristic makes thermoplastics highly recyclable?
What key characteristic makes thermoplastics highly recyclable?
Can be repeatedly heated & reshaped
What is 'plastic memory' in thermoplastics?
What is 'plastic memory' in thermoplastics?
Tendency to return to original form
What happens to thermosetting plastics after the curing process is complete?
What happens to thermosetting plastics after the curing process is complete?
Cannot be softened or reshaped
At approximately what temperature does LDPE (low-density polyethylene) soften?
At approximately what temperature does LDPE (low-density polyethylene) soften?
85°C
What type of molecular structure do thermosetting plastics form?
What type of molecular structure do thermosetting plastics form?
Cross-linked 3D network
Which plastic code (1-7) is used for 'other' or mixed plastic types?
Which plastic code (1-7) is used for 'other' or mixed plastic types?
7
What are the Three Rs approach to plastic waste management?
What are the Three Rs approach to plastic waste management?
Reduce, Reuse, Recycle
How long can most plastics persist in the environment before decomposing?
How long can most plastics persist in the environment before decomposing?
Hundreds of years
When drilling acrylic, what angle should the drill point be reground to?
When drilling acrylic, what angle should the drill point be reground to?
140°
What are the five stages of vacuum forming in order?
What are the five stages of vacuum forming in order?
Clamp, Heat, Form, Cool, Finish
Which thermosetting plastic is commonly used for kitchen worktop surfaces like Formica?
Which thermosetting plastic is commonly used for kitchen worktop surfaces like Formica?
Melamine formaldehyde