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Mechanical Engineering :: Workshop Technology

  1. The casting method adopted for ornaments and toys of nonferrous alloys, is

  2. A.

     Permanent mould casting

    B.

     Slush casting

    C.

     Die casting

    D.

     Centrifugal casting

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  3. The tolerance produced by shell moulding process of casting is

  4. A.

     +0.05 mm

    B.

     ±0.2 mm

    C.

     +0.5 mm

    D.

     ±1 mm

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  5. In order to get uniform thickness of the plate by rolling process, one provides

  6. A.

     Camber on the rolls

    B.

     Offset on the rolls

    C.

     Hardening of the rolls

    D.

     Antifriction bearings

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  7. The operation of straightening a curved sheet metal, is known as

  8. A.

     Drawing

    B.

     Squeezing

    C.

     Coining

    D.

     Planishing

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  9. The operation of producing cup shaped parts from flat sheet metal blanks by bending and plastic flow of metal, is known as

  10. A.

     Drawing

    B.

     Squeezing

    C.

     Coining

    D.

     Planishing

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  11. Extrusion

  12. 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

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  13. Cold working of metal increases

  14. A.

     Tensile strength

    B.

     Yield strength

    C.

     Hardness

    D.

     All of these

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  15. The process used to improve fatigue resistance of the metal by setting up compressive stresses in its surface, is known as

  16. A.

     Hot piercing

    B.

     Extrusion

    C.

     Cold peening

    D.

     Cold heading

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  17. For arc welding

  18. A.

     Alternating current with high frequency is used

    B.

     Alternating current with low frequency is used

    C.

     Direct current is used

    D.

     Any one of these

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  19. In backhand welding, the angle between the welding rod and the work is ________ as compared to forehand welding.

  20. A.

     Same

    B.

     Less

    C.

     More

    D.

     None of these

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