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Mechanical Engineering :: Workshop Technology

  1. Piercing is an operation of cutting

  2. A.
    a cylindrical hole in a sheet of metal by the punch and the die
    B.
    a hole (other than cylindrical) in a sheet of metal by the punch and the die
    C.
    a flat sheet to the desired shape
    D.
    a number of holes evenly spaced in a regular pattern on a sheet of metal

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  3. Shift is a casting defect which

  4. A.
    results in a mismatching of the top and bottom parts of a casting
    B.
    results in general enlargement of a 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

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  5. During drawing operation, the states of stress in cup would include

  6. A.
    compressive stress in the flange
    B.
    tensile stress in the wall
    C.
    both (a) and (b)
    D.
    none of these

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  7. A diamond pointed chisel is used for cutting

  8. A.
    flat surfaces
    B.
    grooves
    C.
    keyways
    D.
    V-shaped grooves

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  9. The length of hacksaw blade is the distance between the outside edges of the holes which fits over the pins.

  10. A.
    Agree
    B.
    Disagree

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  11. The parts of circular cross-section which are symmetrical about the axis of rotation are made by

  12. A.
    hot forging
    B.
    hot spinning
    C.
    hot extrusion
    D.
    hot drawing

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  13. In permanent mould casting method

  14. A.
    molten metal is poured in a metallic mould, retained in the mould long enough for the outer skin to solidify and finally mould is turned over to remove molten metal still in molten condition
    B.
    molten metal is poured and allowed to solidify while the mould is revolving
    C.
    molten metal is forced into mould under high pressure
    D.
    none of the above

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  15. In electric resistance welding, pressure is applied just after the completion of current.

  16. A.
    True
    B.
    False

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  17. Scribing block is used to

  18. A.
    hold the round bars during marking
    B.
    check the trueness of flat surfaces
    C.
    locate the centres of round bars
    D.
    check the surface roughness

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  19. Neutral flame is usd to weld

  20. A.
    steel
    B.
    cast iron
    C.
    copper
    D.
    all of these

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