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Mechanical Engineering :: Production Engineering

  1. In gear hobbing

  2. A.
    only hob rotates
    B.
    only gear blank rotates
    C.
    both hob and gear blank rotates
    D.
    neither hob nor gear blank rotates

  3. Holes are machined by push broaches only for sizing.

  4. A.
    Correct
    B.
    Incorrect

  5. The increase in depth of cut and feed rate __________ surface finish.

  6. A.
    improves
    B.
    deteriorates
    C.
    does not effect

  7. A lathe with four steps on the cone pulley and with backgears will have

  8. A.
    four direct speeds
    B.
    four indirect speeds
    C.
    four direct and four indirect speeds
    D.
    eight indirect speeds

  9. The parameter which completely defines the chip formation in a metal cutting process is

  10. A.
    shear angle
    B.
    chip-tool contact length
    C.
    both (a) and (b)
    D.
    none of these

  11. In machining cast iron, no cutting fluid is required.

  12. A.
    Correct
    B.
    Incorrect

  13. In machining metals, surface roughness is due to

  14. A.
    feed marks or ridges left by the cutting tool
    B.
    fragment of built-up edge on the machined surface
    C.
    cutting tool vibrations
    D.
    all of these

  15. A diamond locating pin is used in jigs and fixtures because

  16. A.
    diamond is very hard and wear resistant
    B.
    it occupies very little space
    C.
    it helps in assembly with tolerance on centre distance
    D.
    it has a long life

  17. In metal machining, the zone where the heat is generated due to friction between the moving chip and the tool face, is called

  18. A.
    friction zone
    B.
    work-tool contact zone
    C.
    shear zone
    D.
    none of these

  19. The drill spindles are provided with standard taper known as

  20. A.
    Morse taper
    B.
    Seller's taper
    C.
    Chapman taper
    D.
    Brown and Sharpe taper