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MCQs

Total Questions : 2607 | Page 68 of 261 pages
Question 671. A bolt of uniform strength can be developed by
  1.    keeping the core diameter of threads equal to the diameter of unthreaded portion of the bolt
  2.    keeping the core diameter smaller than the diameter of the unthreaded portion
  3.    keeping the nominal diameter of threads equal to the diameter of unthreaded portion of the bolt
  4.    none of the above
 Discuss Question
Answer: Option A. -> keeping the core diameter of threads equal to the diameter of unthreaded portion of the bolt
Answer: (a).keeping the core diameter of threads equal to the diameter of unthreaded portion of the bolt
Question 672. The ratio of endurance limit in shear to the endurance limit in flexure is
  1.    0.25
  2.    0.40
  3.    0.55
  4.    0.70
 Discuss Question
Answer: Option C. -> 0.55
Answer: (c).0.55
Question 673. The shear stress in a beam varies from zero at the outer fibres to a maximum at the neutral surface.
  1.    Yes
  2.    No
  3.    Can't say
  4.    None of these
 Discuss Question
Answer: Option A. -> Yes
Answer: (a).Yes
Question 674. The initial tension (in newtons) in a bolt used for making a fluid tight joint like steam engine cover joints, is calculated by the relation (where d = Nominal diameter of bolt in mm)
  1.    1420 d
  2.    1680 d
  3.    2080 d
  4.    2840 d
 Discuss Question
Answer: Option D. -> 2840 d
Answer: (d).2840 d
Question 675. A basic hole is one whose
  1.    lower deviation is zero
  2.    upper deviation is zero
  3.    lower and upper deviations are zero
  4.    none of these
 Discuss Question
Answer: Option A. -> lower deviation is zero
Answer: (a).lower deviation is zero
Question 676. The major diameter of a screw thread is also known as core or root diameter.
  1.    Yes
  2.    No
  3.    Can't say
  4.    None of these
 Discuss Question
Answer: Option B. -> No
Answer: (b).No
Question 677. In a flange coupling, the keys are staggered at __________ along the circumference of the shafts in order to divide the weakening effect caused by key ways.
  1.    90°
  2.    135°
  3.    160°
  4.    180°
 Discuss Question
Answer: Option A. -> 90°
Answer: (a).90°
Question 678. When two non-parallel or intersecting but coplaner shafts are connected by gears, the arrangement is known as bevel gearing.
  1.    Correct
  2.    Incorrect
  3.    Can't say
  4.    None of these
 Discuss Question
Answer: Option A. -> Correct
Answer: (a).Correct
Question 679. In levers, leverage is the ratio of
  1.    load lifted to the effort applied
  2.    mechanical advantage to the velocity ratio
  3.    load arm to the effort arm
  4.    effort arm to the load arm
 Discuss Question
Answer: Option D. -> effort arm to the load arm
Answer: (d).effort arm to the load arm
Question 680. A tapered key which fits in a key way in the hub and the bottom of which is shaped to fit the curved surface of the shaft, is known as hollow saddle key.
  1.    Correct
  2.    Incorrect
  3.    Can't say
  4.    None of these
 Discuss Question
Answer: Option A. -> Correct
Answer: (a).Correct

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