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MCQs

Total Questions : 2607 | Page 75 of 261 pages
Question 741. A bolt of M 24 x 2 means that
  1.    the pitch of the thread is 24 mm and depth is 2 mm
  2.    cross-sectional area of the threads is 24 mm²
  3.    the nominal diameter of bolt is 24 mm and pitch is 2 mm
  4.    the effective diameter of bolt is 24 mm and there are 2 threads per cm
 Discuss Question
Answer: Option C. -> the nominal diameter of bolt is 24 mm and pitch is 2 mm
Answer: (c).the nominal diameter of bolt is 24 mm and pitch is 2 mm
Question 742. In designing a sleeve coupling, outer diameter of the sleeve is taken as (where d = Diameter of the shaft)
  1.    d + 17 mm
  2.    2 d + 13 mm
  3.    2 d + 20 mm
  4.    3.5 d
 Discuss Question
Answer: Option B. -> 2 d + 13 mm
Answer: (b).2 d + 13 mm
Question 743. In case of thick cylinders, the tangential stress across the thickness of cylinder is
  1.    maximum at the outer surface and minimum at the inner surface
  2.    maximum at the inner surface and minimum at the outer surface
  3.    maximum at the inner surface and zero at the outer surface
  4.    maximum at the outer surface and zero at the inner surface
 Discuss Question
Answer: Option B. -> maximum at the inner surface and minimum at the outer surface
Answer: (b).maximum at the inner surface and minimum at the outer surface
Question 744. The malleable material should be plastic but is not essential to be so strong.
  1.    Agree
  2.    Disagree
  3.    Can't say
  4.    None of these
 Discuss Question
Answer: Option A. -> Agree
Answer: (a).Agree
Question 745. A closely coiled helical spring is acted upon by an axial force. The maximum shear stress developed in the spring is τ . The half of the length of the spring if cut off and the remaining spring is acted upon by the same axial force. The maximum shear stress in the spring in new condition will be
  1.    τ/2
  2.    τ
  3.    2 τ
  4.    4 τ
 Discuss Question
Answer: Option B. -> τ
Answer: (b).τ
Question 746. The temperature at which the new grains are formed in the metal is known as
  1.    lower critical temperature
  2.    upper critical temperature
  3.    recrystallisation temperature
  4.    none of these
 Discuss Question
Answer: Option C. -> recrystallisation temperature
Answer: (c).recrystallisation temperature
Question 747. The cam follower generally used in automobile engines is
  1.    knife edge follower
  2.    flat faced follower
  3.    spherical faced follower
  4.    roller follower
 Discuss Question
Answer: Option C. -> spherical faced follower
Answer: (c).spherical faced follower
Question 748. When a closely coiled helical spring is subjected to a couple about its axis, the stress induced in the wire material of the spring is
  1.    bending stress only
  2.    a combination of torsional shear stress and bending
  3.    direct shear stress only
  4.    a combination of bending stress and direct shear stress
 Discuss Question
Answer: Option A. -> bending stress only
Answer: (a).bending stress only
Question 749. When the frictional force helps to apply the brake, then the brake is said to be self-energizing brake.
  1.    Correct
  2.    Incorrect
  3.    Can't say
  4.    None of these
 Discuss Question
Answer: Option A. -> Correct
Answer: (a).Correct
Question 750. In a journal bearing, the load on the bearing is __________ to the axis of the journal.
  1.    parallel
  2.    perpendicular
  3.    Can't say
  4.    None of these
 Discuss Question
Answer: Option B. -> perpendicular
Answer: (b).perpendicular

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