Engineering Problems and Dimensional Analysis
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Questions and Answers

What is the condition for maximum power transfer in a circuit?

  • Load resistance is half the source resistance
  • Load resistance is equal to the source resistance (correct)
  • Load resistance is double the source resistance
  • Load resistance is infinitely high
  • What is the advantage of the Float Zone method in silicon crystal growth?

  • Larger crystal size
  • Higher purity of the silicon crystal (correct)
  • Lower production costs
  • Higher throughput
  • What type of etching process uses a chemical reaction between etchant gases to attack the material surface?

  • Physical Dry Etching
  • Plasma-Assisted Etching
  • Chemical Dry Etching (correct)
  • Wet Etching
  • Which of the following is an example of a bottom-up approach for preparing nanomaterials?

    <p>Dip pen nano-lithography (C)</p> Signup and view all the answers

    Which of the following is NOT a type of lithography technique?

    <p>Microfluidic lithography (D)</p> Signup and view all the answers

    What is the relationship between the melt and the growing crystal in the Czochralski method?

    <p>The crystal is partially submerged in the melt (C)</p> Signup and view all the answers

    What is the primary mechanism of material removal in EDM?

    <p>Mechanical abrasion (C)</p> Signup and view all the answers

    How does the capacitance in an RC circuit affect the EDM process?

    <p>It affects the discharge energy and duration (D)</p> Signup and view all the answers

    What is the minimum requirement for a material to be machined using EDM?

    <p>It should be a conductor (A)</p> Signup and view all the answers

    What is the percentage of supply voltage that the discharge voltage should be for maximum power delivery in an RC relaxation circuit?

    <p>72% (C)</p> Signup and view all the answers

    In what type of environment is electron beam machining possible?

    <p>In a vacuum (A)</p> Signup and view all the answers

    What is the full form of EBM in advanced machining processes?

    <p>Electron Beam Machining (C)</p> Signup and view all the answers

    What is the estimated energy required to vaporize tungsten?

    <p>3 x 10^4 joules/cm3 (B)</p> Signup and view all the answers

    Which type of photoresist is typically used for high-resolution patterns in microstructure fabrication?

    <p>Positive photoresist (D)</p> Signup and view all the answers

    What is the primary purpose of lithography in microstructure fabrication?

    <p>To transfer a pattern onto the substrate (A)</p> Signup and view all the answers

    In plasma-assisted etching, what is the role of the mask?

    <p>To define the areas that will be etched away (A)</p> Signup and view all the answers

    What does the Maximum Power Transfer Theorem state?

    <p>Maximum power is transferred when the load resistance is equal to the source resistance (D)</p> Signup and view all the answers

    How many groups of variables can be formed from a dimensionally homogeneous equation with n variables and m primary dimensions?

    <p>n - m (C)</p> Signup and view all the answers

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