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Mechanical Engineering :: Workshop Technology

  1. Lap joints are employed on plates having thickness

  2. A.

     Less than 3 mm

    B.

     5 to 10 mm

    C.

     12.5 mm

    D.

     Above 25 mm


  3. Thermit welding is often used in

  4. A.

     Replacing broken gear teeth

    B.

     Repairing broken shears

    C.

     Joining rails, truck frames and locomotive frames etc.

    D.

     All of the above


  5. Thread rolling is restricted to

  6. A.

     Ferrous materials

    B.

     Ductile materials

    C.

     Hard materials

    D.

     None of these


  7. When a pattern is made in three parts, the ________ is known as a drag.

  8. A.

     Bottom part

    B.

     Middle part

    C.

     Top part

    D.

     None of these


  9. Which of the following material can be used for making patterns?

  10. A.

     Aluminium

    B.

     Wax

    C.

     Lead

    D.

     All of these


  11. The purpose of a riser is to

  12. A.

     Deliver molten metal into the mould cavity

    B.

     Act as a reservoir for the molten metal

    C.

     Feed the molten metal to the casting in order to compensate for the shrinkage

    D.

     Deliver the molten metal from pouring basin to gate


  13. Which of the following welding method uses a pool of molten metal?

  14. A.

     Carbon arc welding

    B.

     Submerged arc welding

    C.

     TIG arc welding

    D.

     MIG arc welding


  15. A casting defect which occurs due to improper venting of sand is known as

  16. A.

     Cold shuts

    B.

     Blow holes

    C.

     Shift

    D.

     Swell


  17. Which one of the following material will require the largest size of riser for the same size of casting?

  18. A.

     Aluminium

    B.

     Cast iron

    C.

     Steel

    D.

     Copper


  19. A hacksaw blade is specified by its

  20. A.

     Length

    B.

     Material

    C.

     Width

    D.

     Number of teeth