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MCQs

Total Questions : 1798 | Page 6 of 180 pages
Question 51. If a gas metal arc process uses a low arc voltage and the arc is continuously interrupted as the molten electrode metal fills up the arc gap is known as
  1.    ARC
  2.    Short ARC
  3.    ARC length
  4.    ARC blow
 Discuss Question
Answer: Option B. -> Short ARC
Question 52. Friction at the tool-chip interface can be reduced by
  1.    Decreasing the rake angle
  2.    Increasing the depth of cut
  3.    Decreasing the cutting speed
  4.    Increasing the cutting speed
 Discuss Question
Answer: Option D. -> Increasing the cutting speed
Question 53. In centreless grinding, work place centre will be
  1.    Above the line joining the two wheel centres
  2.    Below the line joining the two wheel centres
  3.    On the line joining the two wheel centres
  4.    At the intersection of the line joining the wheel centres with the work place plane
 Discuss Question
Answer: Option A. -> Above the line joining the two wheel centres
Question 54. In down milling, the thickness of chip is
  1.    Minimum at the beginning of the cut and maximum at the end of the cut
  2.    Maximum at the beginning of the cut and minimum at the end of the cut
  3.    Uniform throughout the cut
  4.    None of these
 Discuss Question
Answer: Option B. -> Maximum at the beginning of the cut and minimum at the end of the cut
Question 55. In up milling, the thickness of chip is
  1.    Minimum at the beginning of the cut and maximum at the end of the cut
  2.    Maximum at the beginning of the cut and minimum at the end of the cut
  3.    Uniform throughout the cut
  4.    None of these
 Discuss Question
Answer: Option A. -> Minimum at the beginning of the cut and maximum at the end of the cut
Question 56. When two main plates are kept in alignment butting each other and riveted with cover plate on both sides of the main plates with two rows of rivets in each main plate, the joint is known as _______ double cover butt joint.
  1.    Single riveted
  2.    Double riveted
  3.    Both (A) and (B)
  4.    None of these
 Discuss Question
Answer: Option B. -> Double riveted
Question 57. As tool and work are not in contact in EDM process
  1.    No relative motion occurs between them
  2.    No wear of tool occurs
  3.    No power is consumed during metal cutting
  4.    No force between tool and work occurs
 Discuss Question
Answer: Option D. -> No force between tool and work occurs
Question 58. Glazing in grinding wheels __________ cutting capacity.
  1.    Has no effect on
  2.    Increase
  3.    Decrease
  4.    None of these
 Discuss Question
Answer: Option C. -> Decrease
Question 59. Ceramic cutting tools are
  1.    Made by cold pressing of aluminium oxide powder
  2.    Available in the form of tips
  3.    Brittle and have low bending strength
  4.    All of these
 Discuss Question
Answer: Option D. -> All of these
Question 60. The relation between the tool life (T) in minutes and cutting speed (V) in m/min is (where n = An exponent, which depends upon the tool and workpiece, and C = A constant)
  1.    VnT = C
  2.    VTn = C
  3.    Vn/T = C
  4.    V/Tn = C
 Discuss Question
Answer: Option B. -> VTn = C

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