Railways Exam  >  Railways Questions  >   Consider the following statements:Aluminium ... Start Learning for Free
Consider the following statements:
Aluminium 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. the strength to unit weight ratio of aluminium is high
Which of these statements are correct?
  • a)
    1 and 3
  • b)
    2 and 4
  • c)
    1, 2 and 3
  • d)
    3 only
Correct answer is option 'D'. Can you explain this answer?
Verified Answer
Consider the following statements:Aluminium is being increasingly use...
Hence option D is right answer.
View all questions of this test
Most Upvoted Answer
Consider the following statements:Aluminium is being increasingly use...
Explanation:

Aluminium is being increasingly used for structural purposes because of several advantages it offers. Let's analyze each statement to understand why they are correct.

Statement 1: Aluminium's modulus of elasticity is double that of steel.
The modulus of elasticity is a measure of a material's stiffness or ability to resist deformation. Aluminium has a modulus of elasticity of around 70 GPa, while steel typically has a modulus of elasticity of around 200 GPa. Therefore, statement 1 is correct. Aluminium has a higher modulus of elasticity than steel, which makes it a suitable choice for structural purposes.

Statement 2: Aluminium's coefficient of thermal expansion is half that of steel.
The coefficient of thermal expansion is a measure of how much a material expands or contracts with temperature changes. Aluminium has a coefficient of thermal expansion of around 23 x 10^-6/°C, while steel typically has a coefficient of thermal expansion of around 12 x 10^-6/°C. Therefore, statement 2 is incorrect. Aluminium's coefficient of thermal expansion is actually higher than that of steel, not half.

Statement 3: The strength to unit weight ratio of aluminium is high.
The strength to weight ratio is an important property for structural materials. It indicates how strong a material is relative to its weight. Aluminium has a high strength to weight ratio, meaning it is lightweight yet strong. This property makes it suitable for structural purposes where weight reduction is desired. Therefore, statement 3 is correct.

Conclusion:
From the analysis above, we can conclude that statement 1 and 3 are correct. Therefore, the correct answer is option D) 3 only.
Explore Courses for Railways exam
Consider the following statements:Aluminium 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. the strength to unit weight ratio of aluminium is highWhich of these statements are correct?a)1 and 3b)2 and 4c)1, 2 and 3d)3 onlyCorrect answer is option 'D'. Can you explain this answer?
Question Description
Consider the following statements:Aluminium 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. the strength to unit weight ratio of aluminium is highWhich of these statements are correct?a)1 and 3b)2 and 4c)1, 2 and 3d)3 onlyCorrect answer is option 'D'. Can you explain this answer? for Railways 2024 is part of Railways preparation. The Question and answers have been prepared according to the Railways exam syllabus. Information about Consider the following statements:Aluminium 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. the strength to unit weight ratio of aluminium is highWhich of these statements are correct?a)1 and 3b)2 and 4c)1, 2 and 3d)3 onlyCorrect answer is option 'D'. Can you explain this answer? covers all topics & solutions for Railways 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Consider the following statements:Aluminium 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. the strength to unit weight ratio of aluminium is highWhich of these statements are correct?a)1 and 3b)2 and 4c)1, 2 and 3d)3 onlyCorrect answer is option 'D'. Can you explain this answer?.
Solutions for Consider the following statements:Aluminium 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. the strength to unit weight ratio of aluminium is highWhich of these statements are correct?a)1 and 3b)2 and 4c)1, 2 and 3d)3 onlyCorrect answer is option 'D'. Can you explain this answer? in English & in Hindi are available as part of our courses for Railways. Download more important topics, notes, lectures and mock test series for Railways Exam by signing up for free.
Here you can find the meaning of Consider the following statements:Aluminium 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. the strength to unit weight ratio of aluminium is highWhich of these statements are correct?a)1 and 3b)2 and 4c)1, 2 and 3d)3 onlyCorrect answer is option 'D'. Can you explain this answer? defined & explained in the simplest way possible. Besides giving the explanation of Consider the following statements:Aluminium 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. the strength to unit weight ratio of aluminium is highWhich of these statements are correct?a)1 and 3b)2 and 4c)1, 2 and 3d)3 onlyCorrect answer is option 'D'. Can you explain this answer?, a detailed solution for Consider the following statements:Aluminium 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. the strength to unit weight ratio of aluminium is highWhich of these statements are correct?a)1 and 3b)2 and 4c)1, 2 and 3d)3 onlyCorrect answer is option 'D'. Can you explain this answer? has been provided alongside types of Consider the following statements:Aluminium 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. the strength to unit weight ratio of aluminium is highWhich of these statements are correct?a)1 and 3b)2 and 4c)1, 2 and 3d)3 onlyCorrect answer is option 'D'. Can you explain this answer? theory, EduRev gives you an ample number of questions to practice Consider the following statements:Aluminium 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. the strength to unit weight ratio of aluminium is highWhich of these statements are correct?a)1 and 3b)2 and 4c)1, 2 and 3d)3 onlyCorrect answer is option 'D'. Can you explain this answer? tests, examples and also practice Railways tests.
Explore Courses for Railways exam

Top Courses for Railways

Explore Courses
Signup for Free!
Signup to see your scores go up within 7 days! Learn & Practice with 1000+ FREE Notes, Videos & Tests.
10M+ students study on EduRev