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Which of these statements about composite and metal structures are correct or incorrect?

I. In composite structural components the strength is tailored to the direction of the load by orienting the fibres.
II. Metals structures are chosen preferably to achieve structures with higher strength-to-weight ratio than composite materials.

  • A
    I is correct, II is correct.
  • B
    I is incorrect, II is correct.
  • C
    I is incorrect, II is incorrect.
  • D
    I is correct, II is incorrect.

Statement 1: In composite structural components the strength is tailored to the direction of the load by orienting the fibres.
Is correct, the tensile strength is highest along the direction of the fibres, so not in all directions.

Statement 2: Metals structures are chosen preferably to achieve structures with higher strength-to-weight ratio than composite materials.
This is the opposite; composite materials have a far higher strength-to-weight ratio than metals.

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