Temperature Measurement in Engineering
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Questions and Answers

What is the equation for the change in length (DL) of a solid rod due to a change in temperature (DT)?

  • $DL = L \div \alpha \div DT$
  • $DL = L + \alpha + DT$
  • $DL = L - \alpha - DT$
  • $DL = L \cdot \alpha \cdot DT$ (correct)

    • What does the displacement (x) of rod A depend on?

  • $x = (\alpha_A \times \alpha_B) \cdot DT$
  • $x = (\alpha_A - \alpha_B) \cdot DT$ (correct)
  • $x = (\alpha_A + \alpha_B) \cdot DT$
  • $x = (\alpha_A / \alpha_B) \cdot DT$

    • What is the relationship between the coefficients of linear expansion and the displacement in a bimetallic thermometer?

  • $r = d\theta \cdot \alpha_B$ (correct)
  • $r = d\theta + \alpha_B$
  • $r = d\theta - \alpha_B$
  • $r = d\theta / \alpha_B$

    • What happens to the displacement (r) in a bimetallic thermometer when thinner strips are used?

    <p>r becomes smaller as more bending occurs</p> Signup and view all the answers

    What is Invar known for in relation to its coefficient of linear expansion?

    <p>Invar has a uniquely low coefficient of linear expansion</p> Signup and view all the answers

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