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  • Question

  • Extrusion


  • Options
  • A. is extensively used for making bolts and nuts
  • B. is used for reducing the diameter of round bars and tubes by rotating dies which open and close rapidly on the work
  • C. is used to improve fatigue resistance of the metal by setting up compressive stresses in its surface
  • D. consists of pressing the metal inside a chamber to force it out by high pressure through an orifice which is shaped to provide the desired form of the finished part

  • Correct Answer
  • consists of pressing the metal inside a chamber to force it out by high pressure through an orifice which is shaped to provide the desired form of the finished part 

    • Workshop Technology problems

    Search Results

    • 1. The process of increasing the cross-section of a bar at the expense of its length, is called

    • Options
    • A. drawing down
    • B. upsetting
    • C. spinning
    • D. peening
      • Discuss
    • 2. When the dimension is expressed as , then the basic size is

    • Options
    • A. 20 mm
    • B. 20.035 mm
    • C. 20.025 mm
    • D. 19.975 mm
      • Discuss
    • 3. A casting defect which occurs due to improper venting of sand is known as

    • Options
    • A. cold shuts
    • B. blow holes
    • C. shift
    • D. swell
      • Discuss
    • 4. A hacksaw blade is specified by its

    • Options
    • A. length
    • B. material
    • C. width
    • D. number of teeth
      • Discuss
    • 5. In arc welding, the temperature of heat produced by the electric arc is of the order of

    • Options
    • A. 3000° C to 4000° C
    • B. 4000° C to 5000° C
    • C. 5000° C to 6000° C
    • D. 6000° C to 7000° C
      • Discuss
    • 6. Sand wash is a casting defect which

    • Options
    • A. results in a mismatching of the top and bottom parts of a casting
    • B. results in general enlargement of the casting
    • C. occurs near the ingates as rough lumps on the surface of a casting
    • D. occurs as sand patches on the upper surface of a casting
      • Discuss
    • 7. The metal extrusion process is generally used for producing

    • Options
    • A. uniform solid sections
    • B. uniform hollow sections
    • C. uniform solid and hollow sections
    • D. varying solid and hollow sections
      • Discuss
    • 8. Cast iron and steel pipes are produced by

    • Options
    • A. slush casting
    • B. investment casting
    • C. true centrifugal casting
    • D. die casting
      • Discuss
    • 9. Green sand is a mixture of

    • Options
    • A. 30% sand and 70% clay
    • B. 50% sand and 50% clay
    • C. 70% sand and 30% clay
    • D. 90% sand and 10% clay
      • Discuss
    • 10. The vertical welding do not require plate edge preparation upto 16 mm thickness.

    • Options
    • A. Correct
    • B. Incorrect
      • Discuss

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