MYP Design Topic Materials and Their Properties…

Question 1

An aircraft designer selects aluminium rather than steel for a skin panel of the same volume. Which property most directly supports this choice?

A

High absorbency

B

Low electrical conductivity

C

High brittleness

D

Low density

Question 2

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Two suitable fabrics have different prices per metre and different roll widths. What should a student do to identify the lower-cost option for making six cushion covers?

A

Choose the cheaper price per metre without considering fabric width.

B

Choose the narrower roll because it always produces less cutting waste.

C

Choose the wider roll because width guarantees greater fabric strength.

D

Compare the cost of the usable fabric needed for the complete cutting layout.

Question 3

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Fill in the blank: During assembly, the end of a metal rivet is compressed into a wider head that permanently holds two parts together. The property that allows the rivet end to be shaped without cracking is __________.

brittleness

malleability

ductility

elasticity

Question 4

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Which statement best explains the difference between staple and filament fibres?

A

Staple fibres are synthetic, while filament fibres are always natural.

B

Staple fibres are woven directly, while filament fibres must first be bonded.

C

Staple fibres are short and must be twisted together, while filament fibres are continuous strands.

D

Staple fibres are waterproof, while filament fibres are absorbent.

Question 5

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A component requires density below 1.5 g/cm³, a melting point above 110°C, and a pass in a specified impact test. Material P: 0.9 g/cm³, 100°C, passes. Material Q: 1.8 g/cm³, 180°C, passes. Material R: 1.2 g/cm³, 160°C, passes. Material S: 1.1 g/cm³, 150°C, fails. Which material meets all three requirements?

Material P

Material S

Material Q

Material R