ELECTRO CHEMICAL MCQS

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ELECTRO CHEMICAL MCQS

ELECTRO CHEMICAL MCQS

  1. Which of the following instruments is most accurate
  2. (a) vertical caliper
    (b) manometric screw gauge
    (c) optical projector
    (d) mechanical comparator
    (e) slip gauges.

    optical projector

  3. A surface gauge is used for
  4. (a) levelling the surface plate
    (b) checking the surface finish
    (c) laying out the work accurately
    (d) finding the depth of the surface
    (e) finding flatness of surfaces.

    laying out the work accurately

  5. A feeler gauge is used to check
  6. (a) screw pitch
    (b) radius
    (c) unsymmetrical shape
    (d) surface roughness
    (e) thickness of clearance.

    thickness of clearance.

  7. Work is usually required to be held in a vertical position for laying outFor this purpose, it is clamped to
  8. (a) surface plate
    (b) an angle plate
    (c) a machine bed
    (d) a V-block
    (e) engineer’s square.

    an angle plate

  9. Ahacksaw is specified by the following parameter of its blade
  10. (a) material
    (b) length
    (c) width
    (d) number of teeth
    (e) distance between two holes at extreme.

    length

  11. Thin metal pieces can be cut by
  12. (a) using a blade with very fine teeth
    (b) placing several pieces together and cutting them at the same time
    (c) placing the metal between two pieces of wood and cutting through both metal and wood
    (d) all of the above
    (e) none of the above.

    placing the metal between two pieces of wood and cutting through both metal and wood

  13. The length of a hacksaw blade is measured
  14. (a) over toothed length
    (b) from one extreme to other
    (c) in between centres of two holes at both the ends
    (d) as the length of cut
    (e) as certain multiples of the width of blade.

    in between centres of two holes at both the ends

  15. To prevent the blade of the saw from binding in the saw, blade is
  16. (a) reinforced
    (b) strengthened
    (c) twisted
    (d) set
    (e) tinned and sharpened.

    set

  17. When the file is pushed and pulled across tho work,
  18. (a) straight filing it is called
    (b) push-pull filing
    (c) all of the above
    (d) draw filing
    (e) none of the above.

    draw filing

  19. The thickness of light gauge sheet steel can hachecked with a
  20. (a) finely divided steel scale
    (b) depth gauge
    (c) hermaphrodite caliper
    (d) micrometer
    (e) thickness measuring machine fitted with dial gauge

    micrometer

  21. Optical flats are made of
  22. (a) glass
    (b) quartz
    (c) steel1
    (d) plastic
    (e) silicon.

    quartz

  23. The least count of a metric vernier caliper aving 25 divisions on vernier scale, matching with 9 24 divisions of main scale (1 m.s division = 0.5 mm) is
  24. (a) 0.01 mm
    (b) 0.05 mm
    (c) 0.001 mm
    (d) 0.02 mm
    (e) 0.005 mm.

    0.02 mm

  25. The thread micrometer measures
  26. (a) the major diameter of the thread
    (b) the minor diameter of the thread
    (c) the effective diameter of the thread
    (d) the root diameter of the thread
    (e) all the diameters of the thread

    the effective diameter of the thread

  27. An important precaution to be observed during filing operation is to
  28. (a) not rub finger over file
    (b) not rub finger over the work
    (c) apply equal pressure on file
    (d) properly support file
    (e) clean file frequently

    not rub finger over the work

  29. If a hole is to be tapped its size should be
  30. (a) equal to diameter of the desired thread
    (b) a few microns larger than the desired threads
    (c) a few microns smaller than the desired threads
    (d) any one of the above
    (e) none of the above.

    none of the above.

  31. V-block is used in the workshop to check
  32. (a) roundness of a cylindrical work
    (b) surface roughness
    (c) dimensions of oval job
    (d) taper on a job
    (e) none of the above

    roundness of a cylindrical work

  33. Repeatability of measuring equipment is
  34. (a) the closeness with which a measurement cal be read directly from a measuring instrumen
    (b) a measure of how close the readit true size reading is to the
    (c) difference between measu sured value and actual value
    (d) the smallest change in measured surand that can be
    (e) the capability to indicate the same reagain and again for a given measurand.

    the capability to indicate the same reagain and again for a given measurand.

  35. The taper of internal dovetail can be measured with the help of
  36. (a) sine bar
    (b) combination set
    (c) balls of standard dimensions and slip gauges
    (d) clinometer
    (e) dial gauge.

    balls of standard dimensions and slip gauges

  37. External taper can be accurately measured with the help of
  38. (a) sine bar and slip gauges
    (b) dividing head
    (c) precision balls and height gauge
    (d) combination set
    (e) clinometer.

    sine bar and slip gauges

  39. A sine bar is specified by
  40. (a) its total length
    (b) the centre distance between the two rollers
    (c) the size of the rollers
    (d) the distance between rollers and upper surface
    (e) weight of sine bar.

    the centre distance between the two rollers

  41. Profile of a gear tooth can be checked by
  42. (a) sine bar
    (b) bench micrometer
    (c) optical pyrometer
    (d) optical projector
    (e) slip gauges.

    optical projector

  43. Gear tooth caliper is used to find the chordal thickness of following type of gear tooth
  44. (a) spur gears
    (b) helical gears
    (c) worm gears
    (d) bevel gears
    (e) any type of gear.

    spur gears

  45. All the thread characteristics can be measured precisely with
  46. (a) screw pitch gauge
    (b) micrometer with V anvil
    (c) tool room microscope
    (d) thread gauge
    (e) thread measuring machine.

    tool room microscope

  47. The advantage of vernier caliper over micrometer is that it
  48. (a) is easier and quicker to use
    (b) is more accurate
    (c) can be used to make both inside and outside measurements over a range of sizes
    (d) all of the above
    (e) none of the above.

    can be used to make both inside and outside measurements over a range of sizes

  49. The combination set can be used to
  50. (a) check angular surfaces
    (b) draw circles and arcs
    (c) scribe lines
    (d) all of the above
    (e) none of the above.

    check angular surfaces

  51. Before drilling at a point, it should be ensured that
  52. (a) punch mark has been made at the point
    (b) position of point has been marked by two intersecting lines
    (c) centre drill has been used at the point
    (d) diameters have been located
    (e) surface is flat.

    centre drill has been used at the point

  53. In layout work, a pencil should not be used to draw lines on metal because
  54. (a) it will wipe off easily
    (b) the line will be too wide for accurate work
    (c) the lines will smudge and be difficult to see
    (d) the lines do remain on metal even after good rubbing
    (e) all of the above.

    the line will be too wide for accurate work

  55. Surface plate is usually made of grey cast iron because it provides
  56. (a) very hard plate
    (b) non wearing plate
    (c) easy to cast plate
    (d) lubrication due to graphite flakes
    (e) stable plate.

    lubrication due to graphite flakes

  57. Constant measuring pressure in micrometer screw gauges is ensured by
  58. (a) barrel and thimble
    (b) locknut
    (c) spindle
    (d) spanner
    (e) ratchet.

    ratchet.

  59. Optical gauge work on the principle of
  60. (a) reflection
    (b) refraction
    (c) polarisation
    (d) dispersion
    (e) interference of light rays.

    interference of light rays.

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