BITS Pilani Mechanical Engineering Workshop Practice Lecture 9
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Questions and Answers

What is the primary difference between orthogonal and oblique cutting?

  • Workpiece material
  • Motion of workpiece
  • Type of tool material
  • Cutting edge angle (correct)

    • What percentage of heat is distributed to the workpiece during machining?

  • 20%
  • 10% (correct)
  • 30%
  • 80%

    • Which of the following factors does not influence tool life?

  • Machine tool geometry (correct)
  • Cutting conditions
  • Workpiece material
  • Tool material

    • What is the primary function of the chip in metal cutting?

    <p>To remove the material from the workpiece</p> Signup and view all the answers

    What type of tool has a single cutting edge?

    <p>Single Point tool</p> Signup and view all the answers

    What is the relationship between cutting speed and tool life according to Taylor's expression?

    <p>Inversely proportional</p> Signup and view all the answers

    What is the effect of reducing the cutting speed by 50% on the tool life, given n = 0.5 and C = 400?

    <p>Tool life increases by 300%</p> Signup and view all the answers

    What is the value of n in the modified Taylor's equation, given that θ1 > θ2 > θ3?

    <p>n cannot be determined from the given information</p> Signup and view all the answers

    If the useful tool life of a HSS tool machining mild steel at 18 m/min is 3 hours, what is the tool life when the tool operates at 24 m/min, assuming n = 0.125?

    <p>1.5 hours</p> Signup and view all the answers

    What is the unit of the constant C in Taylor's expression?

    <p>Dimensionless</p> Signup and view all the answers

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