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Consider the following statements:
Aluminum is being increasingly used for structural purposes because
1. Its modulus of elasticity is double that of steel
2. Its coefficient of thermal expansion is half that of steel
3. It requires less maintenance
4. The strength to unit weight ratio of aluminum is high
Which of these statements are correct?
  • a)
    1 and 4
  • b)
    2 and 4
  • c)
    1, 2 and 3
  • d)
    3 and 4
Correct answer is option 'D'. Can you explain this answer?
Most Upvoted Answer
Consider the following statements:Aluminum is being increasingly used ...
Explanation:

Aluminum is being increasingly used for structural purposes due to various reasons. The correct statements are:

1. The strength to unit weight ratio of aluminum is high: This means that aluminum has a high strength-to-weight ratio, which makes it ideal for structural purposes.

2. It requires less maintenance: Aluminum has a high resistance to weathering and corrosion, which means that it requires less maintenance than other materials.

3. Its coefficient of thermal expansion is half that of steel: Aluminum expands and contracts less than steel when exposed to temperature changes, which makes it more stable in different weather conditions.

4. Its modulus of elasticity is double that of steel: Aluminum has a higher modulus of elasticity than steel, which means that it can withstand more stress without permanently deforming.

Therefore, the correct answer is option D, which includes statements 3 and 4.
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Consider the following statements:Aluminum is being increasingly used for structural purposes because1. Its modulus of elasticity is double that of steel2. Its coefficient of thermal expansion is half that of steel3. It requires less maintenance4. The strength to unit weight ratio of aluminum is highWhich of these statements are correct?a)1 and 4b)2 and 4c)1, 2 and 3d)3 and 4Correct answer is option 'D'. Can you explain this answer?
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