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MCQs

Total Questions : 2607 | Page 69 of 261 pages
Question 681. A connecting rod should be
  1.    strong in buckling about X-axis
  2.    strong in buckling about Y-axis
  3.    equally strong in buckling about X-axis and Y-axis
  4.    any one of the above
 Discuss Question
Answer: Option C. -> equally strong in buckling about X-axis and Y-axis
Answer: (c).equally strong in buckling about X-axis and Y-axis
Question 682. According to I.B.R., the efficiency of a triple riveted butt joint with double straps of unequal width (5 rivets per pitch length) should be
  1.    45 to 60%
  2.    63 to 70%
  3.    70 to 83%
  4.    80 to 90%
 Discuss Question
Answer: Option D. -> 80 to 90%
Answer: (d).80 to 90%
Question 683. The number of slots in a 25 mm castle nut is
  1.    2
  2.    4
  3.    6
  4.    8
 Discuss Question
Answer: Option C. -> 6
Answer: (c).6
Question 684. The application of third type levers is found in
  1.    handle of a hand pump
  2.    hand wheel of a punching press
  3.    lever of a loaded safety valve
  4.    a pair of tongs
 Discuss Question
Answer: Option D. -> a pair of tongs
Answer: (d).a pair of tongs
Question 685. A locking device in which the bottom cylindrical portion is recessed to receive the tip of the locking set screw, is called
  1.    castle nut
  2.    jam nut
  3.    ring nut
  4.    sawn nut
 Discuss Question
Answer: Option C. -> ring nut
Answer: (c).ring nut
Question 686. A screw is said to be over hauling screw, if its efficiency is
  1.    less than 50%
  2.    more than 50%
  3.    equal to 50%
  4.    none of these
 Discuss Question
Answer: Option B. -> more than 50%
Answer: (b).more than 50%
Question 687. For unequal width of butt straps, the thickness of butt straps are
  1.    0.75 t for wide strap on the inside and 0.625 t for narrow strap on the outside
  2.    0.75 t for narrow strap on the inside and 0.625 t for wide strap on the outside
  3.    0.75 t for both the straps on the inside and outside
  4.    0.625 t for both the straps on the inside and outside
 Discuss Question
Answer: Option A. -> 0.75 t for wide strap on the inside and 0.625 t for narrow strap on the outside
Answer: (a).0.75 t for wide strap on the inside and 0.625 t for narrow strap on the outside
Question 688. The diameter of washer is generally taken bigger than the nut size.
  1.    True
  2.    False
  3.    Can't say
  4.    None of these
 Discuss Question
Answer: Option A. -> True
Answer: (a).True
Question 689. If a shaft made from ductile material is subjected to combined bending and twisting moment, calculations based on which one of the following failure theories will give the most conservative value?
  1.    Maximum principal stress theory
  2.    Maximum shear stress theory
  3.    Maximum strain energy theory
  4.    Maximum distortion energy theory
 Discuss Question
Answer: Option A. -> Maximum principal stress theory
Answer: (a).Maximum principal stress theory
Question 690. The velocity factor for precision metallic gears cut with high accuracy and operating at velocities upto 20 m/s is equal to
  1.    0.75/ (0.75 + √v)
  2.    3/ (3 + v)
  3.    4.5/ (4.5 + v)
  4.    6/ (6 + v)
 Discuss Question
Answer: Option A. -> 0.75/ (0.75 + √v)
Answer: (a).0.75/ (0.75 + √v)

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