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MCQs

Total Questions : 605 | Page 3 of 61 pages
Question 21. If a concrete column 200 × 200 mm in cross-section is reinforced with four steel bars of 1200 mm² total cross-sectional area. Calculate the safe load for the column if permissible stress in concrete is 5 N/mm² and Es is 15 Ec
  1.    264 MN
  2.    274 MN
  3.    284 MN
  4.    294 MN
 Discuss Question
Answer: Option C. -> 284 MN
Question 22. The ratio of the area of cross-section of a circular section to the area of its core, is
  1.    4
  2.    8
  3.    12
  4.    16
 Discuss Question
Answer: Option D. -> 16
Question 23. Slenderness ratio of a long column, is
  1.    Area of cross-section divided by radius of gyration
  2.    Area of cross-section divided by least radius of gyration
  3.    Radius of gyration divided by area of cross-section
  4.    Length of column divided by least radius of gyration
 Discuss Question
Answer: Option D. -> Length of column divided by least radius of gyration
Question 24. For beams breadth is constant,
  1.    Depth d M
  2.    Depth d 3
  3.    Depth d
  4.    Depth d 1/M
 Discuss Question
Answer: Option B. -> Depth d 3
Question 25. A truss containing j joints and m members, will be a simple truss if
  1.    m = 2j – 3
  2.    j = 2m – 3
  3.    m = 3j – 2
  4.    j = 3m – 2
 Discuss Question
Answer: Option A. -> m = 2j – 3
Question 26. Flat spiral springs
  1.    Consist of uniform thin strips
  2.    Are supported at outer end
  3.    Are wound by applying a torque
  4.    All the above
 Discuss Question
Answer: Option D. -> All the above
Question 27. The ratio of lateral strain to axial strain of a homogeneous material, is known
  1.    Yield ratio
  2.    Hooke’s ratio
  3.    Poisson’s ratio
  4.    Plastic ratio
 Discuss Question
Answer: Option C. -> Poisson’s ratio
Question 28. In case of principal axes of a section
  1.    Sum of moment of inertia is zero
  2.    Difference of moment inertia is zero
  3.    Product of moment of inertia is zero
  4.    None of these
 Discuss Question
Answer: Option C. -> Product of moment of inertia is zero
Question 29. A steel rod of sectional area 250 sq. mm connects two parallel walls 5 m apart. The nuts at the ends were tightened when the rod was heated to 100°C. If steel = 0.000012/C°, Esteel = 0.2 MN/mm², the tensile force developed at a temperature of 50°C, is
  1.    80 N/mm²
  2.    100 N/mm 2
  3.    120 N/mm²
  4.    150 N/mm²
 Discuss Question
Answer: Option C. -> 120 N/mm²
Question 30. A close coil helical spring when subjected to a moment M having its axis along the axis of the helix
  1.    It is subjected to pure bending
  2.    Its mean diameter will decrease
  3.    Its number of coils will increase
  4.    All the above
 Discuss Question
Answer: Option A. -> It is subjected to pure bending

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