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Mechanical Engineering :: Production Engineering

  1. The machining of titanium is difficult due to

  2. A.
    high thermal conductivity of titanium
    B.
    chemical reaction between tool and work
    C.
    low tool-chip contact area
    D.
    none of these

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  3. In orthogonal cutting system, the maximum chip thickness occurs at the middle.

  4. A.
    Correct
    B.
    Incorrect

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  5. Lapping is an operation of

  6. A.
    making a cone-shaped enlargement of the end of a hole
    B.
    smoothing and squaring the surface around a hole
    C.
    sizing and finishing a small diameter hole
    D.
    producing a hole by removing metal along the circumference of a hollow cutting tool

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  7. The different spindle speeds on a lathe form

  8. A.
    arithmetical progression
    B.
    geometrical progression
    C.
    harmonical progression
    D.
    any one of these

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  9. If the helix angle of the drill is made __________ 30°, then the torque required to drive the drill at a given feed will be more.

  10. A.
    equal to
    B.
    less than
    C.
    more than

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  11. The angle included between the two lips projected upon a plane parallel to the drill axis and paralled to the two cutting lips, is called helix angle.

  12. A.
    Correct
    B.
    Incorrect

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  13. In hot machining, tool is made of

  14. A.
    tungsten carbide
    B.
    brass or copper
    C.
    diamond
    D.
    stainless steel

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  15. In ultra-sonic machining, the metal is removed by

  16. A.
    using abrasive slurry between the tool and work
    B.
    direct contact of tool with the work
    C.
    maintaining an electrolyte between the work and tool in a very small gap between the two
    D.
    erosion caused by rapidly recurring spark discharges between the tool and work

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  17. The velocity of tool relative to the workpiece is known as cutting velocity.

  18. A.
    True
    B.
    False

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  19. Grinding wheels should be tested for balance

  20. A.
    only at the time of manufacture
    B.
    before starting the grinding operation
    C.
    at the end of grinding operation
    D.
    occasionally

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