EFFECT OF VARIOUS ANGLES MCQS

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EFFECT OF VARIOUS ANGLES MCQS

EFFECT OF VARIOUS ANGLES MCQS

  1. Crack is developed in grinding wheel due to
  2. (a) high speed
    (b) generation of heat
    (c) hard work
    (d) slower speed
    (e) none of the above

    high speed

  3. The face of the wet type grinder is crowned slightly to minimise the amount of contact between the wheel and the workThis reduces the possibility of the carbide tip
  4. (a) being damaged or destroyed by excessive heat
    (b) being ground away too rapidly
    (c) damaging the wheel by causing it to wear rapidly
    (d) none of the above.
    (e) all of the above

    being damaged or destroyed by excessive heat

  5. In grinding operation, for grinding harder material
  6. (a) softer grade is used
    (b) high grade is used
    (c) medium grade is used
    (d) any grade may be used
    (e) none of the above.

    softer grade is used

  7. The following material is used for diamond lapping
  8. (a) copper
    (b) HSS
    (c) high carbon steel
    (d) aluminium oxide
    (e) none of the above

    none of the above

  9. A dense structure in grinding wheel is used for
  10. (a) ductile material
    (b) heavy cuts
    (c) hard material
    (d) elastic material
    (e) finishing cuts.

    finishing cuts.

  11. Pick up the incorrect statement about AL,O, grinding wheel
  12. (a) it is less tough than SiC
    (b) it is suitable for high tensile strength material
    (c) it is used for grinding hardened steel, hard bronze, steel billets etc.
    (d) it is less hard than SiC
    (e) it is more shock resistant.

    it is less tough than SiC

  13. Ball grinding compared to cylindrical and flat grinding requires
  14. (a) harder wheel
    (b) softer wheel
    (c) medium wheel
    (d) harder/softer wheel depending on material
    (e) softest wheel.

    harder wheel

  15. Hard materials require
  16. (a) fine grit sizes and hard grades
    (b) coarse grit sizes and hard grades
    (c) coarse grit sizes and soft grades
    (d) fine grit sizes and soft grades
    (e) none of the above.

    fine grit sizes and soft grades

  17. Soft ductile materials require
  18. (a) fine grit sizes and hard grades
    (b) coarse grit sizes and hard grades
    (c) coarse grit sizes and soft grades
    (d) fine grit sizes and soft grades
    (e) none of the above.

    coarse grit sizes and hard grades

  19. When the grains of a grinding wheel become dulled, then it needs to be
  20. (a) replaced
    (b) trued
    (c) dressed
    (d) treated
    (e) reground.

    dressed

  21. The hardness of a grinding wheel is specified by
  22. (a) BHN
    (b) Rockwell hardness number
    (c) LPN
    (d) search test
    (e) letter of alphabet.

    letter of alphabet.

  23. Honing operation produces normal quality of finish of the order of
  24. (a) 0.01 to 0.08 um CLA value
    (b) 0.08 to 0.2 um CLA value
    (c) 0.2 to 0.4 um CLA value
    (d) 0.4 to 0.8 um CLA value
    (e) 0.8 to 1.5 um CLA value.

    0.2 to 0.4 um CLA value

  25. A 5 mm thick shoulder on a 100 mm diameter shaft will be ground by the following operation
  26. (a) cylindrical grinding
    (b) centreless grinding
    (c) plunge grinding
    (d) surface grinding
    (e) diamond dressing

    plunge grinding

  27. When the area of contact between wheel and work is small, then following grade should be used for grinding wheel
  28. (a) harder
    (b) hardest
    (c) medium
    (d) softer
    (e) softest.

    softer

  29. The standard marking system for grinding wheels has following number of symbols
  30. (a) 1
    (b) 2
    (c) 3
    (d) 4
    (e) 5

    5

  31. A grinding wheel is balanced as follows so that itwill not vibrate
  32. (a) putting balancing weights on the wheel
    (b) enlarging the spindle hole
    (c) using wheel dampers
    (d) dressing the wheel with dressing tool
    (e) none of the above.

    dressing the wheel with dressing tool

  33. The operation of sharpening a grinding wheel is called
  34. (a) trueing
    (b) dressing
    (c) aligning
    (d) balancing
    (e) bonding.

    dressing

  35. 3The most popular chuck used on surface grinders i
  36. (a) hydraulic chuck
    (b) pneumatic chuck
    (c) magnetic chuck
    (d) three-jaw chuck
    (e) independent chuck

    magnetic chuck

  37. An open structure of a grinding wheel is used for
  38. (a) ductile materials
    (b) tough materials
    (c) soft materials
    (d) heavy cuts
    (e) all of the above.

    all of the above.

  39. Dressing of grinding wheels to restore sharpnese is done by
  40. (a) pumice stone dresser
    (b) tool steel dresser
    (c) diamond dresser
    (d) sharp edged H.S.Scutter
    (e) solid carbon steel bar.

    diamond dresser

  41. In a hard grade grinding wheel, the abrasives
  42. (a) have dense structure
    (b) are hard
    (c) are of fine grain
    (d) get lodged off easily
    (e) are held more securely.

    are held more securely.

  43. When grinding wheels become loaded or glazed, they must be
  44. (a) balanced properly
    (b) aligned accurately
    (c) trued
    (d) dressed
    (e) discarded.

    dressed

  45. For grinding high tensile strength materials, following abrasive is recommended
  46. (a) Al,Og
    (b) SiC
    (c) diamond
    (d) corundum
    (e) boron carbide.

    Al,Og

  47. A centre type cylindrical grinder that permits swivelling the wheel head and head stock at an angle to the table ways is called a
  48. (a) tool and cutter grinder
    (b) surface grinder
    (c) internal grinding machine
    (d) bench grinder
    (e) universal grinder

    universal grinder

  49. The first symbol in a grinding wheel code is the
  50. (a) bond type
    (b) abrasive type
    (c) grain size
    (d) structure
    (e) bond grade.

    abrasive type

  51. In grinding operation, for faster removal of material
  52. (a) fine grain size is used
    (b) medium grain size is used
    (c) coarse grain size is used
    (d) any grain size may be used
    (e) none of the above.

    coarse grain size is used

  53. A grinding wheel is completely specified by thefollowing elements taken in order
  54. (a) type of abrasive, grain size, grade, structure, bond
    (b) grain size, grade, structure, type of abrasive, bond
    (c) structure, bond, grain size, type of abrasive, grade
    (d) bond, structure, grain size, type of abrasive, grade, bond
    (e) none of the above.

    type of abrasive, grain size, grade, structure, bond

  55. 3Which of the following parts of a universal grinding machine can be swivelled with respect to table travel ?
  56. (a) grinding wheel
    (b) table
    (c) headstock
    (d) table slide
    (e) all of the above.

    table slide

  57. Tolerances are specified
  58. (a) to obtain desired fits
    (b) because it is not possible to manufacture a size exactly
    (c) to obtain higher accuracy
    (d) to have proper allowances
    (e) to have proper inspection.

    because it is not possible to manufacture a size exactly

  59. Drilling is an example of
  60. (a) uniform cutting
    (b) simple cutting
    (c) orthogonal cutting
    (d) oblique cutting
    (e) complex cutting.

    oblique cutting

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Cover Topic

“types of angles”,”angles names”,”corresponding angles”,”corresponding angles”

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