ABRASIVE JET MACHINERY MCQ

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ABRASIVE JET MACHINERY MCQ

  1. The helical groove in drill is used
  2. (a) to dispose chip
    (b) to admit cutting fluid
    (c) to save material
    (d) to present sharp cutting edges
    (e) none of the above.

    none of the above.

  3. The quickest type of chuck for centring operation 1s
  4. (a) three jaw
    (b) four jaw
    (c) pneumatic
    (d) magnetic
    (e) none of the above.

    four jaw

  5. Metal in electro-chemical grinding operation is removed by
  6. (a) abrasion and shear
    (b) electro-chemical decomposition
    (c) rusting and melting
    (d) electro-chemical decomposition and abrasion
    (e) ionisation and abrasion.

    rusting and melting

  7. The metal in electro-chemical machining process 1s removed by
  8. (a) ionisation and shearing
    (b) transfer of electrons
    (c) chemical action and abrasion
    (d) migration of ions towards the tool
    (e) electric discharge in strong solutions.

    electric discharge in strong solutions.

  9. In electro-discharge machining process
  10. (a) very high voltage of the order of kilovolts is applied across electrodes
    (b) current of the order 10,000 amps is passed through the work
    (c) continuous sparks to erode the metal are produced
    (d) upto around 250,000 sparks per second are produced
    (e) metal is removed at very fast rate.

    metal is removed at very fast rate.

  11. A complicated contour is to be made exactly in a carbide pieceWhich process will be used?
  12. (a) laser machining
    (b) electro-chemical milling
    (c) ultrasonic machining
    (d) electro-discharge machining
    (e) plasma-arc machining.

    ultrasonic machining

  13. The instruction on the tape of NC machine is prepared in the form of following system
  14. (a) alpha-numeric
    (b) numeric
    (c) binary numbers
    (d) binary coded decimal
    (e) coded form

    binary numbers

  15. NC machine tool is operated by
  16. (a) feedback system
    (b) output-input modules
    (c) a series of coded instructions
    (d) digitising
    (e) numerical controls.

    a series of coded instructions

  17. Acombination of individual machine tools arranged sequentially and properly integrated and inter-locked is known as
  18. (a) production line
    (b) numerically controlled machine
    (c) machining centre
    (d) transfer machine
    (e) automat.

    production line

  19. Dielectric is a must in
  20. (a) EDM process
    (b) ECM process
    (c) ultrasonic machining
    (d) ion beam machining
    (e) laser machining.

    ion beam machining

  21. In EDM process, the work-piece is connected to
  22. (a) negative
    (b) positive
    (c) any one of the above
    (d) earth
    (e) none of the above.

    positive

  23. Reproduction of sharp corners is the limitation of
  24. (a) EDM
    (b) ECM
    (c) plasma
    (d) laser
    (e) none of the above.

    EDM

  25. Broaching operation is frequently used in automobile industry because
  26. (a) it is an automatic machine
    (b) it is a mass production machine
    (c) semi-skilled operators can be employed
    (d) operation is completed in one stroke
    (e) high degree of finish and close tolerances are achieved.

    operation is completed in one stroke

  27. Very large speed ranges are required for
  28. (a) planning machines
    (b) shaping machines
    (c) semi-automatic and automatic turrets
    (d) drilling machines.
    (e) grinding machines

    semi-automatic and automatic turrets

  29. For same tool life, maximum material per minute is removed by increasing
  30. (a) feed
    (b) cutting speed
    (c) tool hardness
    (d) depth of cut
    (e) clearance angle.

    depth of cut

  31. The phenomenon of stick-slip is more predominant when the sliding speed is
  32. (a) low
    (b) zero
    (c) high
    (d) equal to the cutting speed
    (e) at all the speeds.

    low

  33. The trade name given to a non-ferrous cast alloy composed of cobalt, chromium and tungsten is
  34. (a) HSS
    (b) satellite
    (c) ceramic
    (d) boron carbide
    (e) alnico.

    ceramic

  35. An important disadvantage of broaching process 1s
  36. (a) the broaching tools are always longer in length
    (b) only simple shapes can be obtained
    (c) the return stroke is always idle
    (d) the process is suitable only for high volume production
    (e) all of the above.

    the return stroke is always idle

  37. Broaching tools are usually made of
  38. (a) high carbon steel
    (b) high speed steel (H.S.S.)
    (c) ceramics
    (d) tungsten carbide
    (e) stellite.

    high carbon steel

  39. The front teeth of a broach
  40. (a) remove no metal
    (b) remove maximum metal
    (c) remove minimum metal
    (d) perform the burnishing operation
    (e) guide the broach.

    remove maximum metal

  41. For proper broaching operation at least following number of teeth should be in the work at a time
  42. (a) 1
    (b) 2
    (c) 3
    (d) 4
    (e) more than four.

    4

  43. 9A gear has to be subjected to shock and vibrationFollowing type should be selected
  44. (a) gear with full depth teeth
    (b) hybrid gears
    (c) bevel gears
    (d) gear with stub teeth
    (e) hardened gears.

    hybrid gears

  45. Thin gears from sheet metal can be produced commercially by
  46. (a) gear hobbing
    (b) gear shaping
    (c) extruding
    (d) machining
    (e) stamping.

    machining

  47. Which of the following is gear finishing process 2
  48. (a) gear shaving
    (b) gear hobbing
    (c) gear shaping
    (d) gear milling
    (e) gear extrusion.

    gear milling

  49. Which of the following is not a production process for gears?
  50. (a) miling
    (b) stamping
    (c) hot rolling
    (d) extruding
    (e) broaching.

    hot rolling

  51. Hobbing process is not suitable for cutting following type of gear
  52. (a) spurr
    (b) helical
    (c) worm
    (d) bevel1
    (e) all of the above.

    spurr

  53. Formed milling operation of cutting gears can be used for cutting following type of gears
  54. (a) spur
    (b) bevel1
    (c) wormn
    (d) helical
    (e) all of the above.

    spur

  55. Gear forming operation can be performed by
  56. (a) milling
    (b) any one ot the abov
    (c) shaping
    (d) broaching
    (e) none of the above.

    milling

  57. Gear hobbing process 1s faster than millineilling because
  58. (a) indexing time is less
    (b) hob rotates faster
    (c) work rotates faster
    (d) plenty of lubricant is supplied in supplied in hobbinenabling faster operation
    (e) several teeth cut at a time.

    hob rotates faster

  59. Gear cutting with a hob does not involve the following motions
  60. (a) indexing of the work
    (b) rotation of hoh
    (c) radial feed of hob
    (d) rotation of blank
    (e) all of the above

    indexing of the work

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