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Question

Consider the following statements

निम्नलिखित कथनों पर विचार करें

1. Strength of steel increases with carbon content

2. Young's modulus of steel increase with carbon content

3. Young's modulus of steel remain unchanged with variation of carbon content

Which of these statements is/are correct?

इनमें से कौन सा कथन सही है/हैं?

 

A.

1 only

B.

2 only

C.

1 and 2

D.

1 and 3

Answer ( Option D)

1 and 3

Solution

  • As carbon content increases, the strength and hardness of steel increase.
  • Young's Modulus (E) of steel is approximately 200 GPa and is almost independent of carbon content.
  • Therefore, changing carbon percentage affects strength and hardness, but not significantly the modulus of elasticity.

Hence, Statements 1 and 3 are correct.

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