Electric Resistance and Moody Chart Quiz
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Questions and Answers

In which scenario is the electric resistance of a cable inversely proportional to the diameter of the cable?

  • When the resistance is proportional to the square of the diameter
  • When the resistance is inversely proportional to the square root of the diameter (correct)
  • When the resistance is directly proportional to the diameter
  • When the resistance is directly proportional to the square root of the diameter

    • For which situation would the Moody chart NOT be useful?

  • Flow of water in a pipe with corroded and rough inner walls
  • Flow in a subsonic diffuser (correct)
  • Flow of natural gas in a long pipe
  • Flow of oil in a long channel with square cross section

    • If Q = (constant)(r'/u) dp/dx, what type of flow is being assumed?

  • Turbulent flow
  • Irrotational flow (correct)
  • Compressible flow
  • Laminar flow

    • In which type of flow is Bernoulli's equation valid for rotational flow?

    <p>Rotational flow</p> Signup and view all the answers

    When is the simplified continuity equation V·V = 0 not applicable?

    <p>In unsteady incompressible flow</p> Signup and view all the answers

    What is a characteristic of an adiabatic process?

    <p>The heat transfer is zero</p> Signup and view all the answers

    Which statement about the Carnot efficiency is NOT TRUE?

    <p>No reversible power cycle operating between two thermal reservoirs can have an efficiency equal to the Carnot efficiency</p> Signup and view all the answers

    In a rigid container heated by the sun with no shaft work, what does the First Law of Thermodynamics determine about the resulting work?

    <p>Equal to zero</p> Signup and view all the answers

    To test an inventor's claim of an engine revolutionizing the automotive industry, which principle of thermodynamics would be most appropriate?

    <p>Second Law of Thermodynamics</p> Signup and view all the answers

    What type of flow involves steady rotation and incompressibility?

    <p>Steady rotational incompressible flow</p> Signup and view all the answers

    Which property characterizes an adiabatic process?

    <p>Zero heat exchange with surroundings</p> Signup and view all the answers

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