Casting in Manufacturing
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Questions and Answers

What are the typical examples of gray-iron castings used in automobiles?

  • Power-tool housings and gun barrels
  • Engine blocks and crankshafts
  • Agricultural and railroad equipment
  • Transmission valve body and hub rotor with disk-brake cylinder (correct)
  • Which of the following is an example of a permanent mold casting?

  • A ceramic mold
  • A metal mold (correct)
  • A plaster mold
  • A sand mold
  • What type of mold is made by combining two or more different materials?

  • Permanent mold
  • Sand mold
  • Composite mold (correct)
  • Expendable mold
  • Which of the following products is an example of a casting made using a hot-chamber die-casting process?

    <p>A two-piece Polaroid camera case</p> Signup and view all the answers

    What is the primary purpose of using binders in expendable molds?

    <p>To improve the strength of the mold</p> Signup and view all the answers

    What is the most common mold material used in sand casting?

    <p>Green molding sand</p> Signup and view all the answers

    Why is synthetic sand preferred over naturally bonded (bank) sand in sand casting?

    <p>Its composition can be more accurately controlled</p> Signup and view all the answers

    What is the function of the sprue in a sand mold for casting?

    <p>Allows the molten metal to flow downward</p> Signup and view all the answers

    Which type of mold process involves blending organic and inorganic binders to bond the sand grains for greater strength?

    <p>Cold-box mold</p> Signup and view all the answers

    Why is good collapsibility of the mold important in sand casting?

    <p>To avoid defects in the casting, such as hot tearing and cracking</p> Signup and view all the answers

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