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Mechanical Engineering :: Workshop Technology

  1. Thermit, used in Thermit welding, is a mixture of

  2. A.

     Charcoal and iron oxide

    B.

     Charcoal and aluminium

    C.

     Iron oxide and aluminium

    D.

     Charcoal, iron oxide and aluminium


  3. For smoothing and cleaning out depressions in the mould, a ________ is used.

  4. A.

     Slick

    B.

     Lifter

    C.

     Swab

    D.

     Gagger


  5. In order to produce uniform packing of sand in the moulds, a _________ is used.

  6. A.

     Sand slinger

    B.

     Squeezing machine

    C.

     Jolt machine

    D.

     Stripper plate machine


  7. In order to ram the sand harder at the back of the mould and softer on the pattern face, a ________ is used.

  8. A.

     Sand slinger

    B.

     Squeezing machine

    C.

     Jolt machine

    D.

     Stripper plate machine


  9. When a hole or cavity to be cored is not in line with the parting surface, then a ________ is used.

  10. A.

     Horizontal core

    B.

     Vertical core

    C.

     Drop core

    D.

     Balanced core


  11. In order to deliver molten metal from pouring basin to gate, a ________ is used.

  12. A.

     Riser

    B.

     Sprue

    C.

     Core

    D.

     None of these


  13. In welding magnesium with TIG arc welding, direct current with ________ is used.

  14. A.

     Straight polarity

    B.

     Reversed polarity

    C.

     Both (A) and (B)

    D.

     None of these


  15. For welding plates of thickness more than 12.5 mm, its edges

  16. A.

     Do not require bevelling

    B.

     Should be bevelled to a single-V or U-groove

    C.

     Should have a double-V or U-groove on one side

    D.

     Should have a double-V or U-groove on both sides


  17. A rip saw

  18. A.

     Is a two man saw

    B.

     Is used for cutting along the grains of wood

    C.

     Has a narrow blade with two wooden handles

    D.

     All of the above


  19. A jolt machine is used to

  20. A.

     Ram the sand harder at the pattern face with decreasing hardness towards the back of the mould

    B.

     Ram the sand harder at the back of the mould and softer on the pattern face

    C.

     Produce uniform sand hardness throughout the mould

    D.

     Produce uniform packing of sand in the mould