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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

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  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

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  5. Thread rolling is restricted to

  6. A.

     Ferrous materials

    B.

     Ductile materials

    C.

     Hard materials

    D.

     None of these

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  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

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

  10. A.

     Aluminium

    B.

     Wax

    C.

     Lead

    D.

     All of these

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  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

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  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

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  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

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  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

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  19. A hacksaw blade is specified by its

  20. A.

     Length

    B.

     Material

    C.

     Width

    D.

     Number of teeth

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