New & Smart Materials (Junior Cert Engineering): Quizzes
📚Quizzes
Practise the questions
12 questions from this quiz
ShowHide
Practise the questions
12 questions from this quiz
How many times stronger is Kevlar than steel when comparing weight for weight?
How many times stronger is Kevlar than steel when comparing weight for weight?
Five times stronger
Which of these is NOT a common use of Kevlar?
Which of these is NOT a common use of Kevlar?
Aircraft wing structures
What is carbon fibre created by combining?
What is carbon fibre created by combining?
Carbon fibres with epoxy resin
Which application would NOT typically use carbon fibre?
Which application would NOT typically use carbon fibre?
Baby feeding spoons
At what temperature can polymorph be easily shaped by hand?
At what temperature can polymorph be easily shaped by hand?
62°C
What makes polymorph ideal for custom-fitted items?
What makes polymorph ideal for custom-fitted items?
Low melting point and reusability
What do smart materials react and respond to?
What do smart materials react and respond to?
Temperature, light, pressure, & current
What happens to shape-memory alloys when heat is applied after deformation?
What happens to shape-memory alloys when heat is applied after deformation?
They return to their original shape
What two metals make up the shape-memory alloy Nitinol?
What two metals make up the shape-memory alloy Nitinol?
Nickel and titanium
How do wire braces for dental work utilise shape-memory alloys?
How do wire braces for dental work utilise shape-memory alloys?
They apply gentle pressure at body temperature
What property do thermochromic materials exhibit?
What property do thermochromic materials exhibit?
Change colour with temperature
What type of light do photochromic materials particularly respond to?
What type of light do photochromic materials particularly respond to?
Ultraviolet light