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MCQs

Total Questions : 605 | Page 6 of 61 pages
Question 51. Gradually applied static loads do not change with time their
  1.    Magnitude
  2.    Direction
  3.    Point of application
  4.    All the above
 Discuss Question
Answer: Option D. -> All the above
Question 52. Beams composed of more than one material, rigidly connected together so as to behave as one piece, are known as
  1.    Compound beams
  2.    Indeterminate beams
  3.    Determinate beams
  4.    Composite beams
 Discuss Question
Answer: Option D. -> Composite beams
Question 53. The yield moment of a cross section is defined as the moment that will just produce the yield stress in
  1.    The outer most fibre of the section
  2.    The inner most fibre of the section
  3.    The neutral fibre of the section
  4.    The fibre everywhere
 Discuss Question
Answer: Option A. -> The outer most fibre of the section
Question 54. The load on a spring per unit deflection, is called
  1.    Stiffness
  2.    Proof resilience
  3.    Proof stress
  4.    Proof load
 Discuss Question
Answer: Option A. -> Stiffness
Question 55. At yield point of a test piece, the material
  1.    Obeys Hooke’s law
  2.    Behaves in an elastic manner
  3.    Regains its original shape on removal of the load
  4.    Undergoes plastic deformation
 Discuss Question
Answer: Option D. -> Undergoes plastic deformation
Question 56. A steel bar 20 mm in diameter simply-supported at its ends over a total span of 40 cm carries a load at its centre. If the maximum stress induced in the bar is limited to N/mm², the bending strain energy stored in the bar, is
  1.    411 N mm
  2.    511 N mm
  3.    611 N mm
  4.    711 N mm
 Discuss Question
Answer: Option C. -> 611 N mm
Question 57. A load of 1960 N is raised at the end of a steel wire. The minimum diameter of the wire so that stress in the wire does not exceed 100 N/mm² is:
  1.    4.0 mm
  2.    4.5 mm
  3.    5.0 mm
  4.    5.5 mm
 Discuss Question
Answer: Option C. -> 5.0 mm
Question 58. For beams of uniform strength, if depth is constant,
  1.    Width b M
  2.    Width b M
  3.    Width b 3 M
  4.    Width b 1/M
 Discuss Question
Answer: Option B. -> Width b M
Question 59. A composite beam is composed of two equal strips one of brass and other of steel. If the temperature is raised
  1.    Steel experiences tensile force
  2.    Brass experiences compressive force
  3.    Composite beam gets subjected to a couple
  4.    All the above
 Discuss Question
Answer: Option D. -> All the above
Question 60. A compound bar consists of two bars of equal length. Steel bar cross -section is 3500 mm²and that of brass bar is 3000 mm². These are subjected to a compressive load 100,000 N. If Eb = 0.2 MN/mm² and Eb = 0.1 MN/mm², the stresses developed are:
  1.    b = 10 N/mm² s = 20 N/mm 2
  2.    b = 8 N/mm² s = 16 N/mm²
  3.    b = 6 N/mm² s = 12 N/mm²
  4.    b = 5 N/mm² s = 10 N/mm²
 Discuss Question
Answer: Option A. -> b = 10 N/mm² s = 20 N/mm 2

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