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MCQs

Total Questions : 1798 | Page 7 of 180 pages
Question 61. The process of changing the shape of grinding wheel as it becomes worn due to breaking away of the abrasive and bond, is called
  1.    Truing
  2.    Dressing
  3.    Facing
  4.    Clearing
 Discuss Question
Answer: Option A. -> Truing
Question 62. What is the type of welding defect is caused due to stresses on heating and cooling called?
  1.    Incomplete penetration
  2.    Shrinkage void
  3.    Slag Entrapment (Inclusions)
  4.    Incomplete fusion
 Discuss Question
Answer: Option B. -> Shrinkage void
Question 63. The stroke of a shaping machine is 250 mm. It makes 30 double strokes per minute. The overall average speed of operation is
  1.    3.75 m/min
  2.    5 m/min
  3.    7.5 m/min
  4.    15 m/min
 Discuss Question
Answer: Option C. -> 7.5 m/min
Question 64. A feed gear box for a screw cutting lathe is designed on the basis of
  1.    Geometric progression
  2.    Arithmetic progression
  3.    Harmonic progression
  4.    None of these
 Discuss Question
Answer: Option A. -> Geometric progression
Question 65. Ceramic tools are fixed to tool body by
  1.    Soldering
  2.    Brazing
  3.    Welding
  4.    Clamping
 Discuss Question
Answer: Option B. -> Brazing
Question 66. A _________ grinding wheel is used to grind soft materials.
  1.    Course grained
  2.    Medium grained
  3.    Fine grained
  4.    None of these
 Discuss Question
Answer: Option A. -> Course grained
Question 67. In electrochemical machining, the gap between the tool and work is kept as
  1.    0.1 mm
  2.    0.4 mm
  3.    0.35 mm
  4.    0.75 mm
 Discuss Question
Answer: Option D. -> 0.75 mm
Question 68. The hardness of a grinding wheel is determined by the
  1.    Hardness of abrasive grains
  2.    Ability of the bond to retain abrasives
  3.    Hardness of the bond
  4.    Ability of the grinding wheel to penetrate the work piece
 Discuss Question
Answer: Option B. -> Ability of the bond to retain abrasives
Question 69. The floating position of the holding fixture in a rotary transfer device is used to
  1.    Improve the accuracy of location
  2.    Reduce the tendency to over-index
  3.    Improve upon the acceleration and deceleration characteristics
  4.    Reduce the cycle time
 Discuss Question
Answer: Option D. -> Reduce the cycle time
Question 70. The cutting angle of a flat drill varies from
  1.    3° to 8°
  2.    20° to 30°
  3.    60° to 90°
  4.    90° to 120°
 Discuss Question
Answer: Option D. -> 90° to 120°

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